/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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:33:47,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:33:47,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:33:47,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:33:47,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:33:47,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:33:47,999 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:33:48,002 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 [2022-03-03 19:33:48,025 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:33:48,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:33:48,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:33:48,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:33:48,026 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:33:48,026 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:33:48,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:33:48,027 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:33:48,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:33:48,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:33:48,028 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:33:48,028 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:33:48,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:33:48,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:33:48,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:33:48,029 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:33:48,029 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:33:48,029 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:33:48,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:33:48,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:33:48,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:33:48,237 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:33:48,239 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:33:48,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2022-03-03 19:33:48,240 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2022-03-03 19:33:48,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:33:48,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:33:48,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:33:48,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:33:48,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:33:48,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,273 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,278 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:33:48,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:33:48,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:33:48,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:33:48,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:33:48,286 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,287 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,290 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:33:48,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:33:48,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:33:48,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:33:48,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/1) ... [2022-03-03 19:33:48,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:33:48,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:48,320 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) [2022-03-03 19:33:48,325 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 [2022-03-03 19:33:48,346 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:33:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:33:48,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:33:48,346 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:33:48,346 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:33:48,346 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:33:48,346 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:33:48,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:33:48,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:33:48,347 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:33:48,380 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:33:48,381 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:33:48,491 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:33:48,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:33:48,501 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:33:48,502 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:33:48 BoogieIcfgContainer [2022-03-03 19:33:48,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:33:48,504 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:33:48,504 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:33:48,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:33:48,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:33:48" (1/2) ... [2022-03-03 19:33:48,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b373822 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:33:48, skipping insertion in model container [2022-03-03 19:33:48,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:33:48" (2/2) ... [2022-03-03 19:33:48,522 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2022-03-03 19:33:48,525 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:33:48,525 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:33:48,525 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:33:48,525 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:33:48,557 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 19:33:48,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:33:48,613 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 [2022-03-03 19:33:48,614 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 19:33:48,641 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2022-03-03 19:33:48,663 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:48,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:48,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-03 19:33:48,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:48,675 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:48,676 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:48,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1960784707, now seen corresponding path program 1 times [2022-03-03 19:33:48,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:48,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660571522] [2022-03-03 19:33:48,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:48,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:48,834 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:48,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660571522] [2022-03-03 19:33:48,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660571522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:33:48,835 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:33:48,835 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:33:48,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292562294] [2022-03-03 19:33:48,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:33:48,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:33:48,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:33:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:33:48,878 INFO L87 Difference]: Start difference. First operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:48,919 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2022-03-03 19:33:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:33:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-03-03 19:33:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:48,927 INFO L225 Difference]: With dead ends: 84 [2022-03-03 19:33:48,927 INFO L226 Difference]: Without dead ends: 84 [2022-03-03 19:33:48,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:33:48,930 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:48,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 29 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:33:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-03 19:33:48,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-03-03 19:33:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2022-03-03 19:33:48,994 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2022-03-03 19:33:48,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:48,994 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2022-03-03 19:33:48,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:48,995 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2022-03-03 19:33:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:33:48,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:48,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:48,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:33:48,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:48,997 INFO L85 PathProgramCache]: Analyzing trace with hash 273858138, now seen corresponding path program 1 times [2022-03-03 19:33:48,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:48,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692567443] [2022-03-03 19:33:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:48,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:49,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:49,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692567443] [2022-03-03 19:33:49,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692567443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:49,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224820469] [2022-03-03 19:33:49,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:49,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:49,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:49,172 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) [2022-03-03 19:33:49,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:33:49,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:49,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:33:49,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:49,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:49,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:49,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224820469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:49,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:49,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2022-03-03 19:33:49,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368841656] [2022-03-03 19:33:49,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:49,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-03 19:33:49,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:49,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-03 19:33:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-03-03 19:33:49,577 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:49,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:49,967 INFO L93 Difference]: Finished difference Result 197 states and 375 transitions. [2022-03-03 19:33:49,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-03 19:33:49,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:33:49,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:49,969 INFO L225 Difference]: With dead ends: 197 [2022-03-03 19:33:49,969 INFO L226 Difference]: Without dead ends: 188 [2022-03-03 19:33:49,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:33:49,971 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:49,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 139 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:33:49,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-03 19:33:49,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 113. [2022-03-03 19:33:49,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.9285714285714286) internal successors, (216), 112 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:49,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 216 transitions. [2022-03-03 19:33:49,980 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 216 transitions. Word has length 19 [2022-03-03 19:33:49,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:49,980 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 216 transitions. [2022-03-03 19:33:49,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:49,980 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 216 transitions. [2022-03-03 19:33:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:33:49,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:49,981 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:50,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 19:33:50,195 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 [2022-03-03 19:33:50,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:50,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:50,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1123313272, now seen corresponding path program 2 times [2022-03-03 19:33:50,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:50,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657191375] [2022-03-03 19:33:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:50,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:50,329 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:50,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657191375] [2022-03-03 19:33:50,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657191375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:50,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122857381] [2022-03-03 19:33:50,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:33:50,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:50,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:50,333 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) [2022-03-03 19:33:50,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:33:50,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:33:50,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:50,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:33:50,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:50,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:50,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122857381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:50,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:50,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:33:50,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352777859] [2022-03-03 19:33:50,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:50,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:33:50,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:50,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:33:50,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:33:50,609 INFO L87 Difference]: Start difference. First operand 113 states and 216 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:50,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:50,979 INFO L93 Difference]: Finished difference Result 257 states and 493 transitions. [2022-03-03 19:33:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:33:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 19 [2022-03-03 19:33:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:50,980 INFO L225 Difference]: With dead ends: 257 [2022-03-03 19:33:50,981 INFO L226 Difference]: Without dead ends: 248 [2022-03-03 19:33:50,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=580, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:33:50,982 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 166 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:50,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 110 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:33:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-03 19:33:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 117. [2022-03-03 19:33:50,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9655172413793103) internal successors, (228), 116 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:50,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 228 transitions. [2022-03-03 19:33:50,990 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 228 transitions. Word has length 19 [2022-03-03 19:33:50,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:50,990 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 228 transitions. [2022-03-03 19:33:50,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:50,990 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 228 transitions. [2022-03-03 19:33:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:33:50,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:50,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:51,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:51,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-03 19:33:51,193 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:51,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:51,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1992490104, now seen corresponding path program 3 times [2022-03-03 19:33:51,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:51,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079526542] [2022-03-03 19:33:51,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:51,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:51,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:51,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:51,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079526542] [2022-03-03 19:33:51,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079526542] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:33:51,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:33:51,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:33:51,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107122946] [2022-03-03 19:33:51,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:33:51,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:33:51,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:51,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:33:51,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:33:51,225 INFO L87 Difference]: Start difference. First operand 117 states and 228 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:51,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:51,233 INFO L93 Difference]: Finished difference Result 120 states and 230 transitions. [2022-03-03 19:33:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:33:51,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 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 19 [2022-03-03 19:33:51,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:51,234 INFO L225 Difference]: With dead ends: 120 [2022-03-03 19:33:51,234 INFO L226 Difference]: Without dead ends: 120 [2022-03-03 19:33:51,234 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 [2022-03-03 19:33:51,235 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:51,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:33:51,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-03 19:33:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-03-03 19:33:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9327731092436975) internal successors, (230), 119 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 230 transitions. [2022-03-03 19:33:51,240 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 230 transitions. Word has length 19 [2022-03-03 19:33:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:51,240 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 230 transitions. [2022-03-03 19:33:51,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 230 transitions. [2022-03-03 19:33:51,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:33:51,241 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:51,241 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:51,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:33:51,241 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:51,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash -928935378, now seen corresponding path program 4 times [2022-03-03 19:33:51,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:51,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310650538] [2022-03-03 19:33:51,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:51,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:51,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:51,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:51,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310650538] [2022-03-03 19:33:51,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310650538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:51,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243788029] [2022-03-03 19:33:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:33:51,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:51,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:51,319 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) [2022-03-03 19:33:51,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:33:51,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:33:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-03 19:33:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:51,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:51,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:51,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243788029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:51,574 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:51,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 19:33:51,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464608218] [2022-03-03 19:33:51,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:51,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:33:51,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:51,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:33:51,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:33:51,576 INFO L87 Difference]: Start difference. First operand 120 states and 230 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:51,870 INFO L93 Difference]: Finished difference Result 198 states and 372 transitions. [2022-03-03 19:33:51,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:33:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 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 19 [2022-03-03 19:33:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:51,871 INFO L225 Difference]: With dead ends: 198 [2022-03-03 19:33:51,872 INFO L226 Difference]: Without dead ends: 191 [2022-03-03 19:33:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:33:51,873 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 126 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:33:51,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-03 19:33:51,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 114. [2022-03-03 19:33:51,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.920353982300885) internal successors, (217), 113 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 217 transitions. [2022-03-03 19:33:51,878 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 217 transitions. Word has length 19 [2022-03-03 19:33:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:51,879 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 217 transitions. [2022-03-03 19:33:51,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 217 transitions. [2022-03-03 19:33:51,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:33:51,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:51,880 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] [2022-03-03 19:33:51,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-03 19:33:52,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:52,094 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -171096099, now seen corresponding path program 1 times [2022-03-03 19:33:52,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:52,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709636316] [2022-03-03 19:33:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:52,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:52,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709636316] [2022-03-03 19:33:52,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709636316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:52,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258895498] [2022-03-03 19:33:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:52,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:52,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:52,129 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) [2022-03-03 19:33:52,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:33:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:52,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-03 19:33:52,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:52,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:33:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:52,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:52,246 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-03 19:33:52,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-03 19:33:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:52,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258895498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:52,253 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:52,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-03 19:33:52,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5036304] [2022-03-03 19:33:52,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:52,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-03 19:33:52,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:52,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-03 19:33:52,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:33:52,254 INFO L87 Difference]: Start difference. First operand 114 states and 217 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2022-03-03 19:33:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:52,304 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2022-03-03 19:33:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:33:52,305 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 22 [2022-03-03 19:33:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:52,305 INFO L225 Difference]: With dead ends: 152 [2022-03-03 19:33:52,305 INFO L226 Difference]: Without dead ends: 152 [2022-03-03 19:33:52,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:33:52,306 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:52,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:33:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-03 19:33:52,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-03-03 19:33:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.9834710743801653) internal successors, (240), 121 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 240 transitions. [2022-03-03 19:33:52,310 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 240 transitions. Word has length 22 [2022-03-03 19:33:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:52,311 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 240 transitions. [2022-03-03 19:33:52,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2022-03-03 19:33:52,311 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 240 transitions. [2022-03-03 19:33:52,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:33:52,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:52,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:52,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:52,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:52,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash -506947209, now seen corresponding path program 5 times [2022-03-03 19:33:52,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:52,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651966980] [2022-03-03 19:33:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:52,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:52,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:52,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:52,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651966980] [2022-03-03 19:33:52,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651966980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:52,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118354104] [2022-03-03 19:33:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:33:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:52,565 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) [2022-03-03 19:33:52,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:33:52,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:33:52,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:52,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-03 19:33:52,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:52,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-03 19:33:52,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118354104] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:33:52,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-03 19:33:52,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-03-03 19:33:52,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430828284] [2022-03-03 19:33:52,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:33:52,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:33:52,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:52,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:33:52,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:33:52,631 INFO L87 Difference]: Start difference. First operand 122 states and 240 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:52,643 INFO L93 Difference]: Finished difference Result 288 states and 559 transitions. [2022-03-03 19:33:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-03 19:33:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2022-03-03 19:33:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:52,644 INFO L225 Difference]: With dead ends: 288 [2022-03-03 19:33:52,644 INFO L226 Difference]: Without dead ends: 257 [2022-03-03 19:33:52,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:33:52,645 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:52,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 47 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:33:52,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-03 19:33:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 223. [2022-03-03 19:33:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.045045045045045) internal successors, (454), 222 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 454 transitions. [2022-03-03 19:33:52,651 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 454 transitions. Word has length 23 [2022-03-03 19:33:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:52,651 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 454 transitions. [2022-03-03 19:33:52,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 454 transitions. [2022-03-03 19:33:52,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:33:52,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:52,652 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:52,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:52,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:52,869 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:52,869 INFO L85 PathProgramCache]: Analyzing trace with hash 202156410, now seen corresponding path program 2 times [2022-03-03 19:33:52,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:52,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518313914] [2022-03-03 19:33:52,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:52,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,078 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:53,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518313914] [2022-03-03 19:33:53,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518313914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:53,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843178954] [2022-03-03 19:33:53,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:33:53,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:53,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:53,080 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) [2022-03-03 19:33:53,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:33:53,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:33:53,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:33:53,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:53,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:33:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:53,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:33:53,523 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 20 [2022-03-03 19:33:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:53,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843178954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:53,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:53,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2022-03-03 19:33:53,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109287491] [2022-03-03 19:33:53,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:53,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:33:53,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:53,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:33:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:33:53,597 INFO L87 Difference]: Start difference. First operand 223 states and 454 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-03-03 19:33:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:54,181 INFO L93 Difference]: Finished difference Result 390 states and 757 transitions. [2022-03-03 19:33:54,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:33:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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 26 [2022-03-03 19:33:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:54,182 INFO L225 Difference]: With dead ends: 390 [2022-03-03 19:33:54,182 INFO L226 Difference]: Without dead ends: 358 [2022-03-03 19:33:54,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:33:54,184 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 184 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:54,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 281 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:33:54,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-03 19:33:54,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 246. [2022-03-03 19:33:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.0081632653061225) internal successors, (492), 245 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 492 transitions. [2022-03-03 19:33:54,190 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 492 transitions. Word has length 26 [2022-03-03 19:33:54,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:54,190 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 492 transitions. [2022-03-03 19:33:54,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 25 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) [2022-03-03 19:33:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 492 transitions. [2022-03-03 19:33:54,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:33:54,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:54,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:54,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:54,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:54,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1479948104, now seen corresponding path program 3 times [2022-03-03 19:33:54,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:54,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820256215] [2022-03-03 19:33:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:54,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:54,567 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:54,567 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820256215] [2022-03-03 19:33:54,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820256215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:54,568 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580088087] [2022-03-03 19:33:54,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:33:54,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:54,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:54,569 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) [2022-03-03 19:33:54,570 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:33:54,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:33:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:54,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:33:54,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:54,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:33:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:54,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:55,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:33:55,063 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 20 [2022-03-03 19:33:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:55,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580088087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:55,126 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:55,126 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:33:55,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91067592] [2022-03-03 19:33:55,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:55,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:33:55,126 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:33:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:33:55,127 INFO L87 Difference]: Start difference. First operand 246 states and 492 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2022-03-03 19:33:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:56,062 INFO L93 Difference]: Finished difference Result 464 states and 901 transitions. [2022-03-03 19:33:56,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:33:56,062 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 26 [2022-03-03 19:33:56,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:56,064 INFO L225 Difference]: With dead ends: 464 [2022-03-03 19:33:56,064 INFO L226 Difference]: Without dead ends: 432 [2022-03-03 19:33:56,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=415, Invalid=2777, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:33:56,065 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 215 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:56,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 338 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:33:56,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-03-03 19:33:56,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 252. [2022-03-03 19:33:56,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.0199203187250996) internal successors, (507), 251 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:56,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 507 transitions. [2022-03-03 19:33:56,072 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 507 transitions. Word has length 26 [2022-03-03 19:33:56,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:56,073 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 507 transitions. [2022-03-03 19:33:56,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2022-03-03 19:33:56,073 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 507 transitions. [2022-03-03 19:33:56,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:33:56,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:56,074 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:56,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:56,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:56,297 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:56,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash 828023674, now seen corresponding path program 4 times [2022-03-03 19:33:56,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:56,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669111374] [2022-03-03 19:33:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:56,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:56,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:56,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669111374] [2022-03-03 19:33:56,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669111374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:56,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220488105] [2022-03-03 19:33:56,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:33:56,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:56,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:56,459 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) [2022-03-03 19:33:56,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:33:56,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:33:56,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:33:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:56,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:33:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:56,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:56,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:33:56,915 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 20 [2022-03-03 19:33:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:56,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220488105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:56,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:56,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:33:56,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271395012] [2022-03-03 19:33:56,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:56,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:33:56,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:56,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:33:56,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:33:56,986 INFO L87 Difference]: Start difference. First operand 252 states and 507 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2022-03-03 19:33:58,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:33:58,124 INFO L93 Difference]: Finished difference Result 495 states and 962 transitions. [2022-03-03 19:33:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:33:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 26 [2022-03-03 19:33:58,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:33:58,126 INFO L225 Difference]: With dead ends: 495 [2022-03-03 19:33:58,126 INFO L226 Difference]: Without dead ends: 463 [2022-03-03 19:33:58,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=481, Invalid=3301, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:33:58,128 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 235 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:33:58,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 384 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:33:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-03 19:33:58,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 253. [2022-03-03 19:33:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0198412698412698) internal successors, (509), 252 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:33:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 509 transitions. [2022-03-03 19:33:58,137 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 509 transitions. Word has length 26 [2022-03-03 19:33:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:33:58,137 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 509 transitions. [2022-03-03 19:33:58,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2022-03-03 19:33:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 509 transitions. [2022-03-03 19:33:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:33:58,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:33:58,138 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:33:58,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:33:58,347 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,SelfDestructingSolverStorable9 [2022-03-03 19:33:58,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:33:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:33:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -2040701256, now seen corresponding path program 5 times [2022-03-03 19:33:58,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:33:58,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895686905] [2022-03-03 19:33:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:33:58,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:33:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:33:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:58,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:33:58,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895686905] [2022-03-03 19:33:58,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895686905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:33:58,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648399536] [2022-03-03 19:33:58,498 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:33:58,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:33:58,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:33:58,499 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) [2022-03-03 19:33:58,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:33:58,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:33:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:33:58,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:33:58,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:33:58,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:33:58,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:58,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:33:58,989 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:33:58,990 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 18 treesize of output 20 [2022-03-03 19:33:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:33:59,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648399536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:33:59,046 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:33:59,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:33:59,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985902623] [2022-03-03 19:33:59,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:33:59,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:33:59,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:33:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:33:59,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:33:59,048 INFO L87 Difference]: Start difference. First operand 253 states and 509 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2022-03-03 19:34:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:00,359 INFO L93 Difference]: Finished difference Result 474 states and 919 transitions. [2022-03-03 19:34:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:34:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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 26 [2022-03-03 19:34:00,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:00,363 INFO L225 Difference]: With dead ends: 474 [2022-03-03 19:34:00,363 INFO L226 Difference]: Without dead ends: 442 [2022-03-03 19:34:00,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=576, Invalid=3714, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:34:00,365 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 268 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:00,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 328 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1125 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:34:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-03-03 19:34:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 257. [2022-03-03 19:34:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2022-03-03 19:34:00,372 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2022-03-03 19:34:00,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:00,372 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2022-03-03 19:34:00,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 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) [2022-03-03 19:34:00,372 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2022-03-03 19:34:00,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:00,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:00,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:00,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:00,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:00,587 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:00,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2105111822, now seen corresponding path program 6 times [2022-03-03 19:34:00,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:00,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255864827] [2022-03-03 19:34:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:00,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:00,743 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:00,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255864827] [2022-03-03 19:34:00,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255864827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:00,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211656436] [2022-03-03 19:34:00,743 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:34:00,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:00,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:00,744 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) [2022-03-03 19:34:00,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:34:00,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:34:00,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:00,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:00,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:00,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:34:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:01,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:01,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:01,250 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 20 [2022-03-03 19:34:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:01,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211656436] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:01,308 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:01,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-03 19:34:01,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842834745] [2022-03-03 19:34:01,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:01,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:34:01,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:01,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:34:01,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:34:01,309 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:01,959 INFO L93 Difference]: Finished difference Result 446 states and 881 transitions. [2022-03-03 19:34:01,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:34:01,959 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 26 [2022-03-03 19:34:01,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:01,960 INFO L225 Difference]: With dead ends: 446 [2022-03-03 19:34:01,961 INFO L226 Difference]: Without dead ends: 418 [2022-03-03 19:34:01,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=304, Invalid=1858, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:34:01,961 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 127 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:01,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 293 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-03-03 19:34:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 260. [2022-03-03 19:34:01,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2022-03-03 19:34:01,967 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2022-03-03 19:34:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:01,967 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2022-03-03 19:34:01,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2022-03-03 19:34:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:01,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:01,968 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:01,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:02,184 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,SelfDestructingSolverStorable11 [2022-03-03 19:34:02,184 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:02,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1872047740, now seen corresponding path program 7 times [2022-03-03 19:34:02,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:02,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505991169] [2022-03-03 19:34:02,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:02,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:02,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:02,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:02,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505991169] [2022-03-03 19:34:02,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505991169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:02,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229868641] [2022-03-03 19:34:02,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:34:02,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:02,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:02,341 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) [2022-03-03 19:34:02,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:34:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:02,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:02,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:02,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:34:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:02,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:02,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:02,798 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 22 treesize of output 24 [2022-03-03 19:34:02,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:02,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229868641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:02,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:02,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-03 19:34:02,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720512412] [2022-03-03 19:34:02,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:02,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:34:02,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:02,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:34:02,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:34:02,876 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:03,543 INFO L93 Difference]: Finished difference Result 485 states and 950 transitions. [2022-03-03 19:34:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:34:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 26 [2022-03-03 19:34:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:03,545 INFO L225 Difference]: With dead ends: 485 [2022-03-03 19:34:03,545 INFO L226 Difference]: Without dead ends: 453 [2022-03-03 19:34:03,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:34:03,546 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 123 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:03,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 390 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:34:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-03-03 19:34:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 269. [2022-03-03 19:34:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:03,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2022-03-03 19:34:03,551 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2022-03-03 19:34:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:03,551 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2022-03-03 19:34:03,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:03,551 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2022-03-03 19:34:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:03,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:03,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:03,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:03,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:34:03,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:03,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:03,764 INFO L85 PathProgramCache]: Analyzing trace with hash -114947778, now seen corresponding path program 8 times [2022-03-03 19:34:03,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:03,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748431953] [2022-03-03 19:34:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:03,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:03,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:03,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748431953] [2022-03-03 19:34:03,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748431953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:03,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530205820] [2022-03-03 19:34:03,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:34:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:03,906 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) [2022-03-03 19:34:03,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:34:03,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:34:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:03,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:03,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:04,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:04,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:04,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:04,382 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 22 treesize of output 24 [2022-03-03 19:34:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:04,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530205820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:04,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:04,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-03 19:34:04,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546086457] [2022-03-03 19:34:04,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:04,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:34:04,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:04,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:34:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:34:04,455 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:05,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:05,240 INFO L93 Difference]: Finished difference Result 537 states and 1045 transitions. [2022-03-03 19:34:05,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:34:05,241 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 26 [2022-03-03 19:34:05,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:05,242 INFO L225 Difference]: With dead ends: 537 [2022-03-03 19:34:05,242 INFO L226 Difference]: Without dead ends: 505 [2022-03-03 19:34:05,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=2403, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:34:05,243 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 134 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:05,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 318 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:34:05,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-03-03 19:34:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 270. [2022-03-03 19:34:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2022-03-03 19:34:05,248 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2022-03-03 19:34:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:05,249 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2022-03-03 19:34:05,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2022-03-03 19:34:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:05,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:05,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:05,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:05,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:34:05,455 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1311294588, now seen corresponding path program 9 times [2022-03-03 19:34:05,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:05,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671676214] [2022-03-03 19:34:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:05,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:05,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:05,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671676214] [2022-03-03 19:34:05,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671676214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:05,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384207257] [2022-03-03 19:34:05,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:34:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:05,591 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) [2022-03-03 19:34:05,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:34:05,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:34:05,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:05,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:05,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:34:05,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:05,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:06,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:06,025 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 22 treesize of output 24 [2022-03-03 19:34:06,099 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:06,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384207257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:06,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:06,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-03 19:34:06,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697271178] [2022-03-03 19:34:06,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:06,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:34:06,099 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:06,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:34:06,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:34:06,100 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:07,169 INFO L93 Difference]: Finished difference Result 543 states and 1056 transitions. [2022-03-03 19:34:07,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:34:07,170 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 26 [2022-03-03 19:34:07,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:07,177 INFO L225 Difference]: With dead ends: 543 [2022-03-03 19:34:07,177 INFO L226 Difference]: Without dead ends: 511 [2022-03-03 19:34:07,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=488, Invalid=3172, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:34:07,179 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 193 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:07,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 357 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:34:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-03 19:34:07,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 267. [2022-03-03 19:34:07,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2022-03-03 19:34:07,185 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2022-03-03 19:34:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:07,185 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2022-03-03 19:34:07,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2022-03-03 19:34:07,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:07,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:07,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:07,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:07,401 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,SelfDestructingSolverStorable14 [2022-03-03 19:34:07,402 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:07,402 INFO L85 PathProgramCache]: Analyzing trace with hash 290845078, now seen corresponding path program 10 times [2022-03-03 19:34:07,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:07,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289917164] [2022-03-03 19:34:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:07,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:07,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:07,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289917164] [2022-03-03 19:34:07,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289917164] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:07,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290687157] [2022-03-03 19:34:07,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:34:07,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:07,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:07,546 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) [2022-03-03 19:34:07,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:34:07,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:34:07,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:07,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:07,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:08,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:08,009 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 22 treesize of output 24 [2022-03-03 19:34:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:08,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290687157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:08,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:08,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-03-03 19:34:08,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380060981] [2022-03-03 19:34:08,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:08,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:34:08,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:34:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:34:08,083 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:08,706 INFO L93 Difference]: Finished difference Result 435 states and 860 transitions. [2022-03-03 19:34:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:34:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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 26 [2022-03-03 19:34:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:08,707 INFO L225 Difference]: With dead ends: 435 [2022-03-03 19:34:08,707 INFO L226 Difference]: Without dead ends: 407 [2022-03-03 19:34:08,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=311, Invalid=1851, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:34:08,708 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 124 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:08,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 254 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-03 19:34:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 263. [2022-03-03 19:34:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2022-03-03 19:34:08,713 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2022-03-03 19:34:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2022-03-03 19:34:08,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1333333333333333) internal successors, (64), 29 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) [2022-03-03 19:34:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2022-03-03 19:34:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:08,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:08,714 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:08,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:08,923 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1233884658, now seen corresponding path program 11 times [2022-03-03 19:34:08,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:08,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236716937] [2022-03-03 19:34:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:08,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:09,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:09,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236716937] [2022-03-03 19:34:09,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236716937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:09,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548835713] [2022-03-03 19:34:09,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:34:09,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:09,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:09,067 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) [2022-03-03 19:34:09,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:34:09,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:34:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:09,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:09,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:09,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-03 19:34:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:09,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:09,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:09,508 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 22 treesize of output 24 [2022-03-03 19:34:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:09,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548835713] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:09,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:09,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:09,566 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388468777] [2022-03-03 19:34:09,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:09,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:09,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:09,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:09,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:09,568 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:10,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:10,136 INFO L93 Difference]: Finished difference Result 491 states and 960 transitions. [2022-03-03 19:34:10,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:34:10,136 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:10,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:10,138 INFO L225 Difference]: With dead ends: 491 [2022-03-03 19:34:10,138 INFO L226 Difference]: Without dead ends: 459 [2022-03-03 19:34:10,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=1896, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:34:10,139 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 154 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:10,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 260 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:10,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-03-03 19:34:10,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 275. [2022-03-03 19:34:10,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 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) [2022-03-03 19:34:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2022-03-03 19:34:10,144 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2022-03-03 19:34:10,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:10,144 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2022-03-03 19:34:10,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2022-03-03 19:34:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:10,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:10,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:10,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:10,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-03 19:34:10,359 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash -753110860, now seen corresponding path program 12 times [2022-03-03 19:34:10,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:10,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150981870] [2022-03-03 19:34:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:10,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:10,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:10,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150981870] [2022-03-03 19:34:10,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150981870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:10,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240761819] [2022-03-03 19:34:10,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:34:10,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:10,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:10,491 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) [2022-03-03 19:34:10,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:34:10,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:34:10,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:10,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:10,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:10,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:10,777 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:10,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:10,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:10,960 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 22 treesize of output 24 [2022-03-03 19:34:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:11,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240761819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:11,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:11,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:11,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090263555] [2022-03-03 19:34:11,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:11,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:11,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:11,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:11,015 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:11,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:11,802 INFO L93 Difference]: Finished difference Result 543 states and 1055 transitions. [2022-03-03 19:34:11,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:34:11,803 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:11,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:11,804 INFO L225 Difference]: With dead ends: 543 [2022-03-03 19:34:11,804 INFO L226 Difference]: Without dead ends: 511 [2022-03-03 19:34:11,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=2504, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:34:11,805 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 158 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:11,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 295 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-03-03 19:34:11,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 276. [2022-03-03 19:34:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2022-03-03 19:34:11,810 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2022-03-03 19:34:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:11,810 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2022-03-03 19:34:11,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2022-03-03 19:34:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:11,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:11,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:11,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:12,026 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,SelfDestructingSolverStorable17 [2022-03-03 19:34:12,027 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:12,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 673131506, now seen corresponding path program 13 times [2022-03-03 19:34:12,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:12,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826404102] [2022-03-03 19:34:12,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:12,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:12,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:12,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:12,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826404102] [2022-03-03 19:34:12,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826404102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:12,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190785595] [2022-03-03 19:34:12,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:34:12,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:12,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:12,162 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) [2022-03-03 19:34:12,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:34:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:12,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:12,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:12,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:12,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:12,654 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 22 treesize of output 24 [2022-03-03 19:34:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:12,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190785595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:12,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:12,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:12,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953091437] [2022-03-03 19:34:12,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:12,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:12,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:12,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:12,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:12,719 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:13,741 INFO L93 Difference]: Finished difference Result 549 states and 1066 transitions. [2022-03-03 19:34:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:34:13,741 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:13,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:13,742 INFO L225 Difference]: With dead ends: 549 [2022-03-03 19:34:13,742 INFO L226 Difference]: Without dead ends: 517 [2022-03-03 19:34:13,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=491, Invalid=3291, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:34:13,744 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 192 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:13,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 306 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:34:13,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2022-03-03 19:34:13,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 273. [2022-03-03 19:34:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:13,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2022-03-03 19:34:13,749 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2022-03-03 19:34:13,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:13,749 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2022-03-03 19:34:13,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2022-03-03 19:34:13,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:13,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:13,750 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:13,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:13,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:13,967 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:13,967 INFO L85 PathProgramCache]: Analyzing trace with hash -347318004, now seen corresponding path program 14 times [2022-03-03 19:34:13,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:13,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909233207] [2022-03-03 19:34:13,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:13,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:14,127 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:14,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909233207] [2022-03-03 19:34:14,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909233207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:14,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620550785] [2022-03-03 19:34:14,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:34:14,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:14,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:14,128 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) [2022-03-03 19:34:14,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:34:14,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:34:14,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:14,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:14,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:14,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:14,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:14,557 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 22 treesize of output 24 [2022-03-03 19:34:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:14,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620550785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:14,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:14,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:14,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956095222] [2022-03-03 19:34:14,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:14,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:14,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:14,622 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:15,276 INFO L93 Difference]: Finished difference Result 441 states and 870 transitions. [2022-03-03 19:34:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:34:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:15,277 INFO L225 Difference]: With dead ends: 441 [2022-03-03 19:34:15,277 INFO L226 Difference]: Without dead ends: 413 [2022-03-03 19:34:15,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1938, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:34:15,278 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 131 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:15,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 247 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-03-03 19:34:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 266. [2022-03-03 19:34:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:15,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2022-03-03 19:34:15,283 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2022-03-03 19:34:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:15,283 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2022-03-03 19:34:15,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2022-03-03 19:34:15,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:15,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:15,284 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:15,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:34:15,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:15,499 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:15,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:15,500 INFO L85 PathProgramCache]: Analyzing trace with hash 601747836, now seen corresponding path program 15 times [2022-03-03 19:34:15,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:15,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569728708] [2022-03-03 19:34:15,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:15,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:15,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:15,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569728708] [2022-03-03 19:34:15,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569728708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:15,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41850942] [2022-03-03 19:34:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:34:15,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:15,667 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) [2022-03-03 19:34:15,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:34:15,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:34:15,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:34:15,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:15,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:15,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:16,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:16,159 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 22 treesize of output 24 [2022-03-03 19:34:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:16,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41850942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:16,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:16,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:16,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138361457] [2022-03-03 19:34:16,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:16,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:16,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:16,211 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:16,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:16,805 INFO L93 Difference]: Finished difference Result 467 states and 909 transitions. [2022-03-03 19:34:16,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:34:16,806 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:16,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:16,807 INFO L225 Difference]: With dead ends: 467 [2022-03-03 19:34:16,807 INFO L226 Difference]: Without dead ends: 435 [2022-03-03 19:34:16,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2022-03-03 19:34:16,808 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 147 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:16,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 242 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-03-03 19:34:16,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 263. [2022-03-03 19:34:16,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2022-03-03 19:34:16,822 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2022-03-03 19:34:16,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:16,822 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2022-03-03 19:34:16,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2022-03-03 19:34:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:16,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:16,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:16,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-03 19:34:17,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:17,041 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:17,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:17,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1385247682, now seen corresponding path program 16 times [2022-03-03 19:34:17,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:17,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417394839] [2022-03-03 19:34:17,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:17,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:17,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:17,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:17,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417394839] [2022-03-03 19:34:17,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417394839] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:17,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526132179] [2022-03-03 19:34:17,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:34:17,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:17,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:17,185 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) [2022-03-03 19:34:17,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:34:17,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:34:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:17,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:17,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:17,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:17,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:17,676 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 22 treesize of output 24 [2022-03-03 19:34:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:17,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526132179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:17,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:17,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:17,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098285256] [2022-03-03 19:34:17,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:17,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:17,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:17,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:17,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:17,724 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:18,486 INFO L93 Difference]: Finished difference Result 520 states and 1006 transitions. [2022-03-03 19:34:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:34:18,486 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:18,487 INFO L225 Difference]: With dead ends: 520 [2022-03-03 19:34:18,487 INFO L226 Difference]: Without dead ends: 488 [2022-03-03 19:34:18,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:34:18,489 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 151 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:18,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 218 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:18,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-03-03 19:34:18,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 264. [2022-03-03 19:34:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:18,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2022-03-03 19:34:18,493 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2022-03-03 19:34:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:18,493 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2022-03-03 19:34:18,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2022-03-03 19:34:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:18,494 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:18,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:18,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:18,712 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,SelfDestructingSolverStorable21 [2022-03-03 19:34:18,712 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:18,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:18,712 INFO L85 PathProgramCache]: Analyzing trace with hash 40994684, now seen corresponding path program 17 times [2022-03-03 19:34:18,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:18,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139964505] [2022-03-03 19:34:18,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:18,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:18,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:18,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139964505] [2022-03-03 19:34:18,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139964505] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:18,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011063077] [2022-03-03 19:34:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:34:18,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:18,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:18,868 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) [2022-03-03 19:34:18,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:34:18,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:34:18,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-03 19:34:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:18,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:19,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:19,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:19,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-03-03 19:34:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:19,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011063077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:19,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:19,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:19,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418757719] [2022-03-03 19:34:19,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:19,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:19,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:19,398 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:20,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:20,512 INFO L93 Difference]: Finished difference Result 529 states and 1022 transitions. [2022-03-03 19:34:20,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:34:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:20,514 INFO L225 Difference]: With dead ends: 529 [2022-03-03 19:34:20,514 INFO L226 Difference]: Without dead ends: 497 [2022-03-03 19:34:20,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=3286, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:34:20,515 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 178 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:20,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 366 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:34:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-03 19:34:20,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 255. [2022-03-03 19:34:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2022-03-03 19:34:20,520 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2022-03-03 19:34:20,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:20,520 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2022-03-03 19:34:20,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:20,520 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2022-03-03 19:34:20,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:34:20,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:20,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:20,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:20,721 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,SelfDestructingSolverStorable22 [2022-03-03 19:34:20,721 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:20,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:20,721 INFO L85 PathProgramCache]: Analyzing trace with hash -979454826, now seen corresponding path program 18 times [2022-03-03 19:34:20,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:20,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823431126] [2022-03-03 19:34:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:20,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:20,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:20,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:20,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823431126] [2022-03-03 19:34:20,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823431126] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:20,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116045891] [2022-03-03 19:34:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:34:20,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:20,866 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) [2022-03-03 19:34:20,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:34:20,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-03 19:34:20,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:20,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-03 19:34:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:20,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:21,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:21,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:34:21,373 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 22 treesize of output 24 [2022-03-03 19:34:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:21,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116045891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:21,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:21,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-03 19:34:21,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784896149] [2022-03-03 19:34:21,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:21,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:34:21,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:34:21,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:34:21,420 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:22,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:22,089 INFO L93 Difference]: Finished difference Result 418 states and 821 transitions. [2022-03-03 19:34:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-03 19:34:22,089 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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 26 [2022-03-03 19:34:22,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:22,090 INFO L225 Difference]: With dead ends: 418 [2022-03-03 19:34:22,091 INFO L226 Difference]: Without dead ends: 390 [2022-03-03 19:34:22,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=319, Invalid=1937, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:34:22,091 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 118 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:22,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 269 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:34:22,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-03-03 19:34:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 233. [2022-03-03 19:34:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2022-03-03 19:34:22,095 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2022-03-03 19:34:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:22,095 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2022-03-03 19:34:22,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 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) [2022-03-03 19:34:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2022-03-03 19:34:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-03 19:34:22,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:22,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:22,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:22,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:22,307 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1446761785, now seen corresponding path program 19 times [2022-03-03 19:34:22,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:22,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274746797] [2022-03-03 19:34:22,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:22,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:22,352 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:22,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274746797] [2022-03-03 19:34:22,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274746797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:22,352 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789404025] [2022-03-03 19:34:22,353 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:34:22,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:22,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:22,354 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) [2022-03-03 19:34:22,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:34:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:22,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-03 19:34:22,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:22,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-03 19:34:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:22,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:22,491 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-03 19:34:22,491 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 14 [2022-03-03 19:34:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:22,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789404025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:22,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:22,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-03 19:34:22,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962819575] [2022-03-03 19:34:22,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:22,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:34:22,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:34:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:34:22,521 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:22,711 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2022-03-03 19:34:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-03 19:34:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 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 29 [2022-03-03 19:34:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:22,712 INFO L225 Difference]: With dead ends: 362 [2022-03-03 19:34:22,712 INFO L226 Difference]: Without dead ends: 362 [2022-03-03 19:34:22,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-03-03 19:34:22,712 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 119 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:22,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 300 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:34:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-03 19:34:22,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2022-03-03 19:34:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2022-03-03 19:34:22,716 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2022-03-03 19:34:22,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:22,716 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2022-03-03 19:34:22,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2022-03-03 19:34:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:34:22,717 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:22,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:22,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:22,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:22,935 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:22,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1247278231, now seen corresponding path program 20 times [2022-03-03 19:34:22,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:22,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477482979] [2022-03-03 19:34:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:22,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:22,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:22,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477482979] [2022-03-03 19:34:22,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477482979] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:22,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062602177] [2022-03-03 19:34:22,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:34:22,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:22,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:22,962 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) [2022-03-03 19:34:22,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:34:22,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:34:22,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:22,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:34:22,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:23,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:23,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:23,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062602177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:23,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:23,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:34:23,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792472079] [2022-03-03 19:34:23,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:23,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:34:23,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:23,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:34:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:34:23,069 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:23,095 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2022-03-03 19:34:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:34:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:34:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:23,096 INFO L225 Difference]: With dead ends: 534 [2022-03-03 19:34:23,097 INFO L226 Difference]: Without dead ends: 491 [2022-03-03 19:34:23,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:34:23,097 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 53 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:23,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 81 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:34:23,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-03-03 19:34:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2022-03-03 19:34:23,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:23,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2022-03-03 19:34:23,103 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2022-03-03 19:34:23,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:23,103 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2022-03-03 19:34:23,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:23,103 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2022-03-03 19:34:23,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:23,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:23,103 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:23,119 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:34:23,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 19:34:23,319 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:23,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:23,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1300048086, now seen corresponding path program 21 times [2022-03-03 19:34:23,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:23,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136125302] [2022-03-03 19:34:23,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:23,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:23,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:23,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136125302] [2022-03-03 19:34:23,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136125302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:23,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056549825] [2022-03-03 19:34:23,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:34:23,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:23,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:23,623 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) [2022-03-03 19:34:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:34:23,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:34:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:23,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:23,897 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:34:23,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:34:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:24,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:24,398 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:24,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:34:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:24,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056549825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:24,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:24,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 37 [2022-03-03 19:34:24,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602923044] [2022-03-03 19:34:24,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:24,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 19:34:24,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 19:34:24,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:34:24,478 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:25,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:25,789 INFO L93 Difference]: Finished difference Result 840 states and 1688 transitions. [2022-03-03 19:34:25,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:34:25,790 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:25,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:25,792 INFO L225 Difference]: With dead ends: 840 [2022-03-03 19:34:25,792 INFO L226 Difference]: Without dead ends: 792 [2022-03-03 19:34:25,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=4158, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 19:34:25,793 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 225 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:25,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 621 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1677 Invalid, 0 Unknown, 113 Unchecked, 0.6s Time] [2022-03-03 19:34:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-03 19:34:25,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 429. [2022-03-03 19:34:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.0514018691588785) internal successors, (878), 428 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:25,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 878 transitions. [2022-03-03 19:34:25,800 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 878 transitions. Word has length 33 [2022-03-03 19:34:25,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:25,801 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 878 transitions. [2022-03-03 19:34:25,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.894736842105263) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:25,801 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 878 transitions. [2022-03-03 19:34:25,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:25,802 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:25,802 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:25,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:26,002 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,SelfDestructingSolverStorable26 [2022-03-03 19:34:26,002 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2063366420, now seen corresponding path program 22 times [2022-03-03 19:34:26,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:26,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641024788] [2022-03-03 19:34:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:26,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:26,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:26,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:26,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641024788] [2022-03-03 19:34:26,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641024788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:26,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394446593] [2022-03-03 19:34:26,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:34:26,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:26,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:26,287 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) [2022-03-03 19:34:26,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:34:26,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:34:26,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:26,592 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:34:26,592 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 29 treesize of output 13 [2022-03-03 19:34:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:26,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:27,133 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:27,133 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 42 treesize of output 60 [2022-03-03 19:34:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:27,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394446593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:27,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:27,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-03-03 19:34:27,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869255311] [2022-03-03 19:34:27,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:27,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:34:27,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:27,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:34:27,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1408, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:34:27,199 INFO L87 Difference]: Start difference. First operand 429 states and 878 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:28,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:28,867 INFO L93 Difference]: Finished difference Result 990 states and 1989 transitions. [2022-03-03 19:34:28,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:34:28,868 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:28,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:28,870 INFO L225 Difference]: With dead ends: 990 [2022-03-03 19:34:28,870 INFO L226 Difference]: Without dead ends: 942 [2022-03-03 19:34:28,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=590, Invalid=6052, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:34:28,871 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 310 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:28,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 563 Invalid, 1718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1624 Invalid, 0 Unknown, 14 Unchecked, 0.6s Time] [2022-03-03 19:34:28,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-03-03 19:34:28,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 432. [2022-03-03 19:34:28,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.0580046403712298) internal successors, (887), 431 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 887 transitions. [2022-03-03 19:34:28,878 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 887 transitions. Word has length 33 [2022-03-03 19:34:28,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:28,878 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 887 transitions. [2022-03-03 19:34:28,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:28,878 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 887 transitions. [2022-03-03 19:34:28,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:28,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:28,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:28,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:29,091 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,SelfDestructingSolverStorable27 [2022-03-03 19:34:29,091 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:29,092 INFO L85 PathProgramCache]: Analyzing trace with hash -952229162, now seen corresponding path program 23 times [2022-03-03 19:34:29,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:29,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943271601] [2022-03-03 19:34:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:29,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:29,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:29,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:29,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943271601] [2022-03-03 19:34:29,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943271601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:29,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140765133] [2022-03-03 19:34:29,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:34:29,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:29,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:29,359 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) [2022-03-03 19:34:29,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:34:29,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:34:29,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:29,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:29,674 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:34:29,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:34:29,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:29,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:30,326 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:30,326 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 49 treesize of output 63 [2022-03-03 19:34:30,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:30,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140765133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:30,403 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:30,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2022-03-03 19:34:30,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264389660] [2022-03-03 19:34:30,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:30,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-03 19:34:30,403 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-03 19:34:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:34:30,404 INFO L87 Difference]: Start difference. First operand 432 states and 887 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:33,177 INFO L93 Difference]: Finished difference Result 1010 states and 2038 transitions. [2022-03-03 19:34:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:34:33,178 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:33,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:33,180 INFO L225 Difference]: With dead ends: 1010 [2022-03-03 19:34:33,180 INFO L226 Difference]: Without dead ends: 962 [2022-03-03 19:34:33,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2935 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=843, Invalid=9459, Unknown=0, NotChecked=0, Total=10302 [2022-03-03 19:34:33,181 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 295 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 2683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:33,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 650 Invalid, 2683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2556 Invalid, 0 Unknown, 36 Unchecked, 0.9s Time] [2022-03-03 19:34:33,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-03-03 19:34:33,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 433. [2022-03-03 19:34:33,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.0578703703703702) internal successors, (889), 432 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:33,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 889 transitions. [2022-03-03 19:34:33,188 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 889 transitions. Word has length 33 [2022-03-03 19:34:33,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:33,189 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 889 transitions. [2022-03-03 19:34:33,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 43 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:33,189 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 889 transitions. [2022-03-03 19:34:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:33,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:33,189 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:33,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:33,398 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,SelfDestructingSolverStorable28 [2022-03-03 19:34:33,399 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:33,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:33,399 INFO L85 PathProgramCache]: Analyzing trace with hash 433393428, now seen corresponding path program 24 times [2022-03-03 19:34:33,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:33,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114649766] [2022-03-03 19:34:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:33,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:33,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:33,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114649766] [2022-03-03 19:34:33,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114649766] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:33,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730159897] [2022-03-03 19:34:33,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:34:33,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:33,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:33,662 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) [2022-03-03 19:34:33,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:34:33,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:34:33,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:34:33,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:33,967 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:34:33,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:34:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:34,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:34,548 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:34,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:34:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:34,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730159897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:34,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:34,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-03-03 19:34:34,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789638086] [2022-03-03 19:34:34,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:34,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:34:34,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:34:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1402, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:34:34,603 INFO L87 Difference]: Start difference. First operand 433 states and 889 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:36,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:36,841 INFO L93 Difference]: Finished difference Result 1121 states and 2248 transitions. [2022-03-03 19:34:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:34:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:36,844 INFO L225 Difference]: With dead ends: 1121 [2022-03-03 19:34:36,844 INFO L226 Difference]: Without dead ends: 1077 [2022-03-03 19:34:36,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1981 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=726, Invalid=6756, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:34:36,845 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 359 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 2286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:36,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 583 Invalid, 2286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2124 Invalid, 0 Unknown, 33 Unchecked, 0.8s Time] [2022-03-03 19:34:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-03-03 19:34:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 436. [2022-03-03 19:34:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.057471264367816) internal successors, (895), 435 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:36,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 895 transitions. [2022-03-03 19:34:36,853 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 895 transitions. Word has length 33 [2022-03-03 19:34:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 895 transitions. [2022-03-03 19:34:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 895 transitions. [2022-03-03 19:34:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:36,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:36,854 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:36,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:37,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:37,067 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:37,067 INFO L85 PathProgramCache]: Analyzing trace with hash -207717162, now seen corresponding path program 25 times [2022-03-03 19:34:37,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:37,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155814932] [2022-03-03 19:34:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:37,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:37,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:37,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:37,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155814932] [2022-03-03 19:34:37,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155814932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:37,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636040203] [2022-03-03 19:34:37,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:34:37,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:37,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:37,321 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) [2022-03-03 19:34:37,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:34:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:37,580 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:34:37,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:34:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:37,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:38,148 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:38,148 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 42 treesize of output 60 [2022-03-03 19:34:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:38,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636040203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:38,200 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:38,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-03-03 19:34:38,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527427462] [2022-03-03 19:34:38,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:38,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:34:38,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:34:38,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1397, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:34:38,201 INFO L87 Difference]: Start difference. First operand 436 states and 895 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:41,162 INFO L93 Difference]: Finished difference Result 1186 states and 2391 transitions. [2022-03-03 19:34:41,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 19:34:41,163 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:41,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:41,166 INFO L225 Difference]: With dead ends: 1186 [2022-03-03 19:34:41,166 INFO L226 Difference]: Without dead ends: 1142 [2022-03-03 19:34:41,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1159, Invalid=9761, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:34:41,167 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 400 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 2149 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 2469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:41,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 577 Invalid, 2469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2149 Invalid, 0 Unknown, 124 Unchecked, 0.8s Time] [2022-03-03 19:34:41,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-03 19:34:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 442. [2022-03-03 19:34:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.058956916099773) internal successors, (908), 441 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 908 transitions. [2022-03-03 19:34:41,175 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 908 transitions. Word has length 33 [2022-03-03 19:34:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:41,175 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 908 transitions. [2022-03-03 19:34:41,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 908 transitions. [2022-03-03 19:34:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:41,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:41,176 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:41,191 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-03 19:34:41,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:41,379 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1218525204, now seen corresponding path program 26 times [2022-03-03 19:34:41,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:41,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757069247] [2022-03-03 19:34:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:41,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:41,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:41,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:41,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757069247] [2022-03-03 19:34:41,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757069247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:41,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648704341] [2022-03-03 19:34:41,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:34:41,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:41,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:41,642 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) [2022-03-03 19:34:41,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:34:41,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:34:41,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:41,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:41,907 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:34:41,907 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 29 treesize of output 13 [2022-03-03 19:34:42,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:42,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:42,517 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:42,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:34:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:42,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648704341] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:42,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:42,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 39 [2022-03-03 19:34:42,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037799885] [2022-03-03 19:34:42,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:42,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:34:42,575 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:42,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:34:42,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1396, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:34:42,576 INFO L87 Difference]: Start difference. First operand 442 states and 908 transitions. Second operand has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:46,340 INFO L93 Difference]: Finished difference Result 1365 states and 2739 transitions. [2022-03-03 19:34:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:34:46,341 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:46,344 INFO L225 Difference]: With dead ends: 1365 [2022-03-03 19:34:46,344 INFO L226 Difference]: Without dead ends: 1325 [2022-03-03 19:34:46,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3942 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1492, Invalid=11164, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:34:46,345 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 462 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:46,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 672 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2581 Invalid, 0 Unknown, 40 Unchecked, 1.0s Time] [2022-03-03 19:34:46,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-03-03 19:34:46,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 450. [2022-03-03 19:34:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.0579064587973273) internal successors, (924), 449 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 924 transitions. [2022-03-03 19:34:46,354 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 924 transitions. Word has length 33 [2022-03-03 19:34:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:46,354 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 924 transitions. [2022-03-03 19:34:46,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.975) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:46,354 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 924 transitions. [2022-03-03 19:34:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:46,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:46,355 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:46,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:46,570 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,SelfDestructingSolverStorable31 [2022-03-03 19:34:46,571 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:46,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash -560176048, now seen corresponding path program 27 times [2022-03-03 19:34:46,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:46,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475618436] [2022-03-03 19:34:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:46,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:46,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:46,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475618436] [2022-03-03 19:34:46,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475618436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:46,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808511878] [2022-03-03 19:34:46,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:34:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:46,854 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) [2022-03-03 19:34:46,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:34:46,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:34:46,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:46,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:46,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:47,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:34:47,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:34:47,297 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 27 treesize of output 13 [2022-03-03 19:34:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:47,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:47,841 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:47,842 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 42 treesize of output 60 [2022-03-03 19:34:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:47,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808511878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:47,915 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:47,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:34:47,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412141130] [2022-03-03 19:34:47,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:47,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:34:47,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:47,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:34:47,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:34:47,916 INFO L87 Difference]: Start difference. First operand 450 states and 924 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:48,766 INFO L93 Difference]: Finished difference Result 657 states and 1310 transitions. [2022-03-03 19:34:48,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:34:48,766 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:48,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:48,768 INFO L225 Difference]: With dead ends: 657 [2022-03-03 19:34:48,768 INFO L226 Difference]: Without dead ends: 625 [2022-03-03 19:34:48,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=320, Invalid=3220, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:34:48,768 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:48,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 707 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 997 Invalid, 0 Unknown, 235 Unchecked, 0.3s Time] [2022-03-03 19:34:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-03-03 19:34:48,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 474. [2022-03-03 19:34:48,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.059196617336152) internal successors, (974), 473 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 974 transitions. [2022-03-03 19:34:48,774 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 974 transitions. Word has length 33 [2022-03-03 19:34:48,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:48,774 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 974 transitions. [2022-03-03 19:34:48,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:48,775 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 974 transitions. [2022-03-03 19:34:48,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:48,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:48,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:48,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:48,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:48,991 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:48,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:48,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2059320862, now seen corresponding path program 28 times [2022-03-03 19:34:48,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:48,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003428061] [2022-03-03 19:34:48,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:48,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:49,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:49,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003428061] [2022-03-03 19:34:49,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003428061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:49,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691858005] [2022-03-03 19:34:49,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:34:49,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:49,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:49,249 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) [2022-03-03 19:34:49,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:34:49,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:34:49,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:49,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:49,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:49,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:34:49,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:34:49,644 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 27 treesize of output 13 [2022-03-03 19:34:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:49,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:50,192 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:50,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:34:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:50,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691858005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:50,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:50,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:34:50,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411700067] [2022-03-03 19:34:50,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:34:50,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:34:50,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:34:50,249 INFO L87 Difference]: Start difference. First operand 474 states and 974 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:51,485 INFO L93 Difference]: Finished difference Result 858 states and 1706 transitions. [2022-03-03 19:34:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:34:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:51,487 INFO L225 Difference]: With dead ends: 858 [2022-03-03 19:34:51,487 INFO L226 Difference]: Without dead ends: 814 [2022-03-03 19:34:51,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=415, Invalid=4697, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:34:51,489 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1281 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:51,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 597 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1281 Invalid, 0 Unknown, 467 Unchecked, 0.5s Time] [2022-03-03 19:34:51,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2022-03-03 19:34:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 482. [2022-03-03 19:34:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.0644490644490645) internal successors, (993), 481 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 993 transitions. [2022-03-03 19:34:51,497 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 993 transitions. Word has length 33 [2022-03-03 19:34:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:51,497 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 993 transitions. [2022-03-03 19:34:51,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 993 transitions. [2022-03-03 19:34:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:51,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:51,498 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:51,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:51,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:51,709 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:51,709 INFO L85 PathProgramCache]: Analyzing trace with hash 719195666, now seen corresponding path program 29 times [2022-03-03 19:34:51,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:51,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784752448] [2022-03-03 19:34:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:51,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:52,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:52,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784752448] [2022-03-03 19:34:52,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784752448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:52,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979816494] [2022-03-03 19:34:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:34:52,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:52,010 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) [2022-03-03 19:34:52,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:34:52,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:34:52,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:52,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:52,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:34:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:34:52,422 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 25 treesize of output 13 [2022-03-03 19:34:52,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:52,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:53,124 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:53,124 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 49 treesize of output 63 [2022-03-03 19:34:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:53,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979816494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:53,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:53,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:34:53,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493641224] [2022-03-03 19:34:53,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:53,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:34:53,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:34:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1789, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:34:53,177 INFO L87 Difference]: Start difference. First operand 482 states and 993 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:54,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:54,945 INFO L93 Difference]: Finished difference Result 938 states and 1891 transitions. [2022-03-03 19:34:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:34:54,946 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:54,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:54,948 INFO L225 Difference]: With dead ends: 938 [2022-03-03 19:34:54,948 INFO L226 Difference]: Without dead ends: 895 [2022-03-03 19:34:54,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=557, Invalid=6415, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:34:54,949 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 251 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 825 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:54,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 611 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1542 Invalid, 0 Unknown, 825 Unchecked, 0.6s Time] [2022-03-03 19:34:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-03-03 19:34:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 489. [2022-03-03 19:34:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.057377049180328) internal successors, (1004), 488 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1004 transitions. [2022-03-03 19:34:54,956 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1004 transitions. Word has length 33 [2022-03-03 19:34:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:54,956 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1004 transitions. [2022-03-03 19:34:54,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1004 transitions. [2022-03-03 19:34:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:54,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:54,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:54,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:55,175 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,SelfDestructingSolverStorable34 [2022-03-03 19:34:55,175 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash -57190306, now seen corresponding path program 30 times [2022-03-03 19:34:55,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:55,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29593751] [2022-03-03 19:34:55,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:55,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:55,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29593751] [2022-03-03 19:34:55,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29593751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:55,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714894351] [2022-03-03 19:34:55,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:34:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:55,435 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) [2022-03-03 19:34:55,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:34:55,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:34:55,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:34:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:34:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:55,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:34:55,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:34:55,828 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 25 treesize of output 13 [2022-03-03 19:34:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:55,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:56,362 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:56,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:34:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:56,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714894351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:56,412 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:56,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:34:56,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528834221] [2022-03-03 19:34:56,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:56,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:34:56,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:34:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:34:56,413 INFO L87 Difference]: Start difference. First operand 489 states and 1004 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:57,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:34:57,713 INFO L93 Difference]: Finished difference Result 772 states and 1570 transitions. [2022-03-03 19:34:57,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:34:57,714 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:34:57,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:34:57,716 INFO L225 Difference]: With dead ends: 772 [2022-03-03 19:34:57,716 INFO L226 Difference]: Without dead ends: 753 [2022-03-03 19:34:57,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=454, Invalid=4802, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:34:57,716 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 132 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1277 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:34:57,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 460 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1277 Invalid, 0 Unknown, 114 Unchecked, 0.5s Time] [2022-03-03 19:34:57,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-03-03 19:34:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 485. [2022-03-03 19:34:57,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.06198347107438) internal successors, (998), 484 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:57,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 998 transitions. [2022-03-03 19:34:57,722 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 998 transitions. Word has length 33 [2022-03-03 19:34:57,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:34:57,722 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 998 transitions. [2022-03-03 19:34:57,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:34:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 998 transitions. [2022-03-03 19:34:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:34:57,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:34:57,723 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:34:57,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:34:57,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-03 19:34:57,939 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:34:57,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:34:57,939 INFO L85 PathProgramCache]: Analyzing trace with hash 426212954, now seen corresponding path program 31 times [2022-03-03 19:34:57,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:34:57,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703202896] [2022-03-03 19:34:57,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:34:57,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:34:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:58,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:34:58,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703202896] [2022-03-03 19:34:58,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703202896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:34:58,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543065376] [2022-03-03 19:34:58,198 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:34:58,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:34:58,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:34:58,199 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) [2022-03-03 19:34:58,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:34:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:34:58,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:34:58,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:34:58,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:34:58,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:34:58,583 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 27 treesize of output 13 [2022-03-03 19:34:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:58,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:34:59,123 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:34:59,123 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 42 treesize of output 60 [2022-03-03 19:34:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:34:59,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543065376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:34:59,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:34:59,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:34:59,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889626176] [2022-03-03 19:34:59,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:34:59,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:34:59,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:34:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:34:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:34:59,185 INFO L87 Difference]: Start difference. First operand 485 states and 998 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:00,594 INFO L93 Difference]: Finished difference Result 930 states and 1875 transitions. [2022-03-03 19:35:00,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:35:00,594 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:00,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:00,597 INFO L225 Difference]: With dead ends: 930 [2022-03-03 19:35:00,597 INFO L226 Difference]: Without dead ends: 890 [2022-03-03 19:35:00,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=512, Invalid=5494, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:35:00,601 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 212 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:00,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 496 Invalid, 1908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1211 Invalid, 0 Unknown, 644 Unchecked, 0.4s Time] [2022-03-03 19:35:00,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-03 19:35:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 483. [2022-03-03 19:35:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.0643153526970957) internal successors, (995), 482 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 995 transitions. [2022-03-03 19:35:00,608 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 995 transitions. Word has length 33 [2022-03-03 19:35:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:00,608 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 995 transitions. [2022-03-03 19:35:00,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 995 transitions. [2022-03-03 19:35:00,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:00,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:00,609 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:00,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-03 19:35:00,821 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,SelfDestructingSolverStorable36 [2022-03-03 19:35:00,821 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:00,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:00,821 INFO L85 PathProgramCache]: Analyzing trace with hash 2104818256, now seen corresponding path program 32 times [2022-03-03 19:35:00,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:00,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629492913] [2022-03-03 19:35:00,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:00,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:01,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:01,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629492913] [2022-03-03 19:35:01,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629492913] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:01,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619842910] [2022-03-03 19:35:01,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:35:01,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:01,108 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) [2022-03-03 19:35:01,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:35:01,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:35:01,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:01,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:01,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:01,502 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 27 treesize of output 13 [2022-03-03 19:35:01,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:01,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:02,051 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:02,052 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 42 treesize of output 60 [2022-03-03 19:35:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:02,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619842910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:02,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:02,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:02,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902546346] [2022-03-03 19:35:02,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:02,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:02,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:02,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:02,104 INFO L87 Difference]: Start difference. First operand 483 states and 995 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:03,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:03,825 INFO L93 Difference]: Finished difference Result 1240 states and 2502 transitions. [2022-03-03 19:35:03,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:35:03,825 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:03,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:03,828 INFO L225 Difference]: With dead ends: 1240 [2022-03-03 19:35:03,828 INFO L226 Difference]: Without dead ends: 1196 [2022-03-03 19:35:03,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=579, Invalid=5741, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:35:03,829 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 235 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 796 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:03,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 687 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1517 Invalid, 0 Unknown, 796 Unchecked, 0.5s Time] [2022-03-03 19:35:03,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2022-03-03 19:35:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 484. [2022-03-03 19:35:03,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0641821946169774) internal successors, (997), 483 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 997 transitions. [2022-03-03 19:35:03,841 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 997 transitions. Word has length 33 [2022-03-03 19:35:03,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:03,841 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 997 transitions. [2022-03-03 19:35:03,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:03,841 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 997 transitions. [2022-03-03 19:35:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:03,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:03,842 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:03,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-03 19:35:04,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:04,057 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:04,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:04,057 INFO L85 PathProgramCache]: Analyzing trace with hash 688170706, now seen corresponding path program 33 times [2022-03-03 19:35:04,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:04,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924183479] [2022-03-03 19:35:04,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:04,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:04,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:04,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924183479] [2022-03-03 19:35:04,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924183479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:04,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667354456] [2022-03-03 19:35:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:35:04,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:04,311 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) [2022-03-03 19:35:04,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:35:04,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:35:04,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:04,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:04,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:04,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:04,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:04,736 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 27 treesize of output 13 [2022-03-03 19:35:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:04,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:05,294 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:05,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:35:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:05,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667354456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:05,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:05,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:05,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703212014] [2022-03-03 19:35:05,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:05,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:05,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:05,345 INFO L87 Difference]: Start difference. First operand 484 states and 997 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:07,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:07,519 INFO L93 Difference]: Finished difference Result 1015 states and 2027 transitions. [2022-03-03 19:35:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:35:07,520 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:07,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:07,522 INFO L225 Difference]: With dead ends: 1015 [2022-03-03 19:35:07,522 INFO L226 Difference]: Without dead ends: 975 [2022-03-03 19:35:07,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2820 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=783, Invalid=8529, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:35:07,527 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 225 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 1521 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1149 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:07,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 649 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1521 Invalid, 0 Unknown, 1149 Unchecked, 0.6s Time] [2022-03-03 19:35:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-03 19:35:07,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 485. [2022-03-03 19:35:07,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.0640495867768593) internal successors, (999), 484 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 999 transitions. [2022-03-03 19:35:07,535 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 999 transitions. Word has length 33 [2022-03-03 19:35:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:07,535 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 999 transitions. [2022-03-03 19:35:07,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 999 transitions. [2022-03-03 19:35:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:07,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:07,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:07,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:07,754 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,SelfDestructingSolverStorable38 [2022-03-03 19:35:07,754 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:07,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:07,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1079366512, now seen corresponding path program 34 times [2022-03-03 19:35:07,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:07,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975197280] [2022-03-03 19:35:07,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:07,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:08,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:08,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975197280] [2022-03-03 19:35:08,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975197280] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:08,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263977717] [2022-03-03 19:35:08,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:35:08,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:08,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:08,013 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) [2022-03-03 19:35:08,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:35:08,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:35:08,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:08,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:08,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:08,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:08,410 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 27 treesize of output 13 [2022-03-03 19:35:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:08,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:08,950 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:08,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:35:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:09,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263977717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:09,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:09,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:09,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143761731] [2022-03-03 19:35:09,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:09,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:09,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:09,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:09,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:09,016 INFO L87 Difference]: Start difference. First operand 485 states and 999 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:10,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:10,593 INFO L93 Difference]: Finished difference Result 901 states and 1823 transitions. [2022-03-03 19:35:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:35:10,594 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:10,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:10,595 INFO L225 Difference]: With dead ends: 901 [2022-03-03 19:35:10,595 INFO L226 Difference]: Without dead ends: 865 [2022-03-03 19:35:10,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=528, Invalid=5324, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:35:10,596 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1861 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:10,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 769 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1861 Invalid, 0 Unknown, 234 Unchecked, 0.6s Time] [2022-03-03 19:35:10,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-03-03 19:35:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 486. [2022-03-03 19:35:10,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.063917525773196) internal successors, (1001), 485 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1001 transitions. [2022-03-03 19:35:10,603 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1001 transitions. Word has length 33 [2022-03-03 19:35:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:10,603 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1001 transitions. [2022-03-03 19:35:10,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1001 transitions. [2022-03-03 19:35:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:10,604 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:10,604 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:10,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-03 19:35:10,804 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,SelfDestructingSolverStorable39 [2022-03-03 19:35:10,804 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:10,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1463707666, now seen corresponding path program 35 times [2022-03-03 19:35:10,805 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:10,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075145909] [2022-03-03 19:35:10,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:10,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:11,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:11,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075145909] [2022-03-03 19:35:11,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075145909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:11,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024010616] [2022-03-03 19:35:11,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:35:11,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:11,060 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) [2022-03-03 19:35:11,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:35:11,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:35:11,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:11,081 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:35:11,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:11,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:11,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:11,414 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 27 treesize of output 13 [2022-03-03 19:35:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:11,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:12,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:12,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:12,225 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:35:12,226 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 47 treesize of output 55 [2022-03-03 19:35:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:12,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024010616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:12,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:12,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:35:12,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451515847] [2022-03-03 19:35:12,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:12,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:35:12,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:35:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:35:12,339 INFO L87 Difference]: Start difference. First operand 486 states and 1001 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:17,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:17,127 INFO L93 Difference]: Finished difference Result 1280 states and 2550 transitions. [2022-03-03 19:35:17,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-03 19:35:17,128 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:17,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:17,130 INFO L225 Difference]: With dead ends: 1280 [2022-03-03 19:35:17,130 INFO L226 Difference]: Without dead ends: 1216 [2022-03-03 19:35:17,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5943 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1883, Invalid=17577, Unknown=0, NotChecked=0, Total=19460 [2022-03-03 19:35:17,131 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 412 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 3129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 821 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:17,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 716 Invalid, 3129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2154 Invalid, 0 Unknown, 821 Unchecked, 0.9s Time] [2022-03-03 19:35:17,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-03-03 19:35:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 500. [2022-03-03 19:35:17,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0761523046092183) internal successors, (1036), 499 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:17,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1036 transitions. [2022-03-03 19:35:17,139 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1036 transitions. Word has length 33 [2022-03-03 19:35:17,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:17,140 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1036 transitions. [2022-03-03 19:35:17,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:17,140 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1036 transitions. [2022-03-03 19:35:17,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:17,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:17,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:17,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:35:17,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:17,341 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1405017264, now seen corresponding path program 36 times [2022-03-03 19:35:17,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:17,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016170093] [2022-03-03 19:35:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:17,596 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:17,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016170093] [2022-03-03 19:35:17,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016170093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:17,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464950629] [2022-03-03 19:35:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:35:17,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:17,597 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) [2022-03-03 19:35:17,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:35:17,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:35:17,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:17,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:17,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:17,911 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 27 treesize of output 13 [2022-03-03 19:35:18,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:18,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:18,504 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:18,504 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 42 treesize of output 60 [2022-03-03 19:35:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:18,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464950629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:18,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:18,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:18,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012814505] [2022-03-03 19:35:18,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:18,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:18,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:18,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:18,570 INFO L87 Difference]: Start difference. First operand 500 states and 1036 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:21,853 INFO L93 Difference]: Finished difference Result 1137 states and 2293 transitions. [2022-03-03 19:35:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-03 19:35:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:21,855 INFO L225 Difference]: With dead ends: 1137 [2022-03-03 19:35:21,855 INFO L226 Difference]: Without dead ends: 1109 [2022-03-03 19:35:21,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4192 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1412, Invalid=11244, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:35:21,856 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 322 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:21,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 702 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 1794 Invalid, 0 Unknown, 850 Unchecked, 0.7s Time] [2022-03-03 19:35:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-03-03 19:35:21,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 493. [2022-03-03 19:35:21,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.071138211382114) internal successors, (1019), 492 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1019 transitions. [2022-03-03 19:35:21,868 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1019 transitions. Word has length 33 [2022-03-03 19:35:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:21,868 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1019 transitions. [2022-03-03 19:35:21,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:21,869 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1019 transitions. [2022-03-03 19:35:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:21,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:21,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:21,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:35:22,070 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,SelfDestructingSolverStorable41 [2022-03-03 19:35:22,071 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash 996112700, now seen corresponding path program 37 times [2022-03-03 19:35:22,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:22,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649012581] [2022-03-03 19:35:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:22,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:22,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649012581] [2022-03-03 19:35:22,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649012581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:22,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778414265] [2022-03-03 19:35:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:35:22,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:22,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:22,322 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) [2022-03-03 19:35:22,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:35:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:22,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:22,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:22,739 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 27 treesize of output 13 [2022-03-03 19:35:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:22,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:23,268 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:23,269 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 42 treesize of output 60 [2022-03-03 19:35:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:23,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778414265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:23,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:23,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:23,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739909822] [2022-03-03 19:35:23,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:23,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:23,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:23,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:23,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:23,322 INFO L87 Difference]: Start difference. First operand 493 states and 1019 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:24,324 INFO L93 Difference]: Finished difference Result 823 states and 1671 transitions. [2022-03-03 19:35:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:35:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:24,326 INFO L225 Difference]: With dead ends: 823 [2022-03-03 19:35:24,326 INFO L226 Difference]: Without dead ends: 775 [2022-03-03 19:35:24,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=377, Invalid=4045, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:35:24,326 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 172 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:24,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 501 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1131 Invalid, 0 Unknown, 161 Unchecked, 0.4s Time] [2022-03-03 19:35:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-03 19:35:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 492. [2022-03-03 19:35:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.069246435845214) internal successors, (1016), 491 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1016 transitions. [2022-03-03 19:35:24,333 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1016 transitions. Word has length 33 [2022-03-03 19:35:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:24,333 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1016 transitions. [2022-03-03 19:35:24,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1016 transitions. [2022-03-03 19:35:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:24,333 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:24,333 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:24,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-03 19:35:24,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:24,535 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:24,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1571949162, now seen corresponding path program 38 times [2022-03-03 19:35:24,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:24,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992445929] [2022-03-03 19:35:24,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:24,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:24,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:24,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992445929] [2022-03-03 19:35:24,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992445929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:24,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067013913] [2022-03-03 19:35:24,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:35:24,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:24,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:24,806 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) [2022-03-03 19:35:24,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:35:24,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:35:24,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:24,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:24,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:25,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:25,206 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 27 treesize of output 13 [2022-03-03 19:35:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:25,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:25,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:25,754 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 42 treesize of output 60 [2022-03-03 19:35:25,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:25,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067013913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:25,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:25,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:25,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096405442] [2022-03-03 19:35:25,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:25,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:25,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:25,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:25,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:25,811 INFO L87 Difference]: Start difference. First operand 492 states and 1016 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:27,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:27,129 INFO L93 Difference]: Finished difference Result 809 states and 1637 transitions. [2022-03-03 19:35:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:35:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:27,130 INFO L225 Difference]: With dead ends: 809 [2022-03-03 19:35:27,131 INFO L226 Difference]: Without dead ends: 759 [2022-03-03 19:35:27,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=475, Invalid=4927, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:35:27,131 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 164 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 541 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:27,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 588 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1115 Invalid, 0 Unknown, 541 Unchecked, 0.4s Time] [2022-03-03 19:35:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-03-03 19:35:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 491. [2022-03-03 19:35:27,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0673469387755103) internal successors, (1013), 490 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1013 transitions. [2022-03-03 19:35:27,137 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1013 transitions. Word has length 33 [2022-03-03 19:35:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1013 transitions. [2022-03-03 19:35:27,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:27,138 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1013 transitions. [2022-03-03 19:35:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:27,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:27,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:27,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-03 19:35:27,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:27,339 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:27,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:27,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732976, now seen corresponding path program 39 times [2022-03-03 19:35:27,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:27,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781092239] [2022-03-03 19:35:27,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:27,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:27,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:27,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781092239] [2022-03-03 19:35:27,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781092239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:27,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695215621] [2022-03-03 19:35:27,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:35:27,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:27,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:27,592 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) [2022-03-03 19:35:27,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:35:27,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:35:27,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:27,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:27,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:27,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:27,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:27,894 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 27 treesize of output 13 [2022-03-03 19:35:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:28,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:28,487 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:28,487 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 42 treesize of output 60 [2022-03-03 19:35:28,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:28,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695215621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:28,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:28,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:28,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786056906] [2022-03-03 19:35:28,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:28,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:28,543 INFO L87 Difference]: Start difference. First operand 491 states and 1013 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:29,873 INFO L93 Difference]: Finished difference Result 951 states and 1937 transitions. [2022-03-03 19:35:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:35:29,874 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:29,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:29,875 INFO L225 Difference]: With dead ends: 951 [2022-03-03 19:35:29,875 INFO L226 Difference]: Without dead ends: 923 [2022-03-03 19:35:29,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=476, Invalid=4636, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:35:29,876 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 899 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:29,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 547 Invalid, 2039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1725 Invalid, 0 Unknown, 257 Unchecked, 0.6s Time] [2022-03-03 19:35:29,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-03-03 19:35:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 494. [2022-03-03 19:35:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.0649087221095335) internal successors, (1018), 493 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1018 transitions. [2022-03-03 19:35:29,883 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1018 transitions. Word has length 33 [2022-03-03 19:35:29,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:29,883 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1018 transitions. [2022-03-03 19:35:29,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:29,883 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1018 transitions. [2022-03-03 19:35:29,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:29,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:29,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:29,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-03 19:35:30,093 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,SelfDestructingSolverStorable44 [2022-03-03 19:35:30,093 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:30,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash -11051816, now seen corresponding path program 40 times [2022-03-03 19:35:30,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:30,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641178728] [2022-03-03 19:35:30,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:30,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:30,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641178728] [2022-03-03 19:35:30,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641178728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:30,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95516932] [2022-03-03 19:35:30,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:35:30,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:30,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:30,355 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) [2022-03-03 19:35:30,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:35:30,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:35:30,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:30,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:30,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:30,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:30,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:30,751 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 27 treesize of output 13 [2022-03-03 19:35:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:30,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:31,277 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:31,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:35:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:31,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95516932] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:31,346 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:31,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:31,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462882762] [2022-03-03 19:35:31,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:31,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:31,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:31,347 INFO L87 Difference]: Start difference. First operand 494 states and 1018 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:33,189 INFO L93 Difference]: Finished difference Result 863 states and 1703 transitions. [2022-03-03 19:35:33,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:35:33,190 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:33,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:33,191 INFO L225 Difference]: With dead ends: 863 [2022-03-03 19:35:33,191 INFO L226 Difference]: Without dead ends: 796 [2022-03-03 19:35:33,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2057 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=541, Invalid=6101, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:35:33,192 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 249 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 2307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:33,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 682 Invalid, 2307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1611 Invalid, 0 Unknown, 639 Unchecked, 0.6s Time] [2022-03-03 19:35:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 796 states. [2022-03-03 19:35:33,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 796 to 520. [2022-03-03 19:35:33,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.052023121387283) internal successors, (1065), 519 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:33,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1065 transitions. [2022-03-03 19:35:33,198 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1065 transitions. Word has length 33 [2022-03-03 19:35:33,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:33,198 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1065 transitions. [2022-03-03 19:35:33,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:33,199 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1065 transitions. [2022-03-03 19:35:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:33,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:33,199 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:33,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-03 19:35:33,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-03 19:35:33,400 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:33,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1816969572, now seen corresponding path program 41 times [2022-03-03 19:35:33,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:33,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678305212] [2022-03-03 19:35:33,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:33,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:33,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:33,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:33,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678305212] [2022-03-03 19:35:33,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678305212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:33,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043987617] [2022-03-03 19:35:33,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:35:33,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:33,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:33,664 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) [2022-03-03 19:35:33,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:35:33,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:35:33,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:33,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:35:33,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:34,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:34,053 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 25 treesize of output 13 [2022-03-03 19:35:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:34,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:34,580 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:34,581 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 42 treesize of output 60 [2022-03-03 19:35:34,632 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:34,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043987617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:34,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:34,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:34,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128652531] [2022-03-03 19:35:34,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:34,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:34,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:34,633 INFO L87 Difference]: Start difference. First operand 520 states and 1065 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:36,282 INFO L93 Difference]: Finished difference Result 871 states and 1735 transitions. [2022-03-03 19:35:36,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:35:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:36,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:36,284 INFO L225 Difference]: With dead ends: 871 [2022-03-03 19:35:36,284 INFO L226 Difference]: Without dead ends: 828 [2022-03-03 19:35:36,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1688 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=485, Invalid=5367, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:35:36,285 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 202 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1758 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 2066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 255 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:36,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 633 Invalid, 2066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1758 Invalid, 0 Unknown, 255 Unchecked, 0.6s Time] [2022-03-03 19:35:36,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-03 19:35:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 516. [2022-03-03 19:35:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0543689320388347) internal successors, (1058), 515 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1058 transitions. [2022-03-03 19:35:36,291 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1058 transitions. Word has length 33 [2022-03-03 19:35:36,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:36,291 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1058 transitions. [2022-03-03 19:35:36,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:36,291 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1058 transitions. [2022-03-03 19:35:36,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:36,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:36,292 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:36,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:36,492 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,SelfDestructingSolverStorable46 [2022-03-03 19:35:36,492 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:36,493 INFO L85 PathProgramCache]: Analyzing trace with hash -689184002, now seen corresponding path program 42 times [2022-03-03 19:35:36,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:36,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814402871] [2022-03-03 19:35:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:36,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:36,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:36,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814402871] [2022-03-03 19:35:36,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814402871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:36,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314354145] [2022-03-03 19:35:36,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:35:36,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:36,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:36,758 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) [2022-03-03 19:35:36,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:35:36,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:35:36,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:35:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:37,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:37,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:37,142 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 27 treesize of output 13 [2022-03-03 19:35:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:37,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:37,683 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:37,683 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 42 treesize of output 60 [2022-03-03 19:35:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:37,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314354145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:37,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:37,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:37,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560217879] [2022-03-03 19:35:37,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:37,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:37,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:37,735 INFO L87 Difference]: Start difference. First operand 516 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:39,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:39,191 INFO L93 Difference]: Finished difference Result 859 states and 1715 transitions. [2022-03-03 19:35:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:35:39,192 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:39,193 INFO L225 Difference]: With dead ends: 859 [2022-03-03 19:35:39,193 INFO L226 Difference]: Without dead ends: 824 [2022-03-03 19:35:39,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=473, Invalid=5227, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:35:39,194 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 205 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 1570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:39,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 496 Invalid, 1570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1118 Invalid, 0 Unknown, 400 Unchecked, 0.4s Time] [2022-03-03 19:35:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-03-03 19:35:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 526. [2022-03-03 19:35:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 2.041904761904762) internal successors, (1072), 525 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1072 transitions. [2022-03-03 19:35:39,200 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1072 transitions. Word has length 33 [2022-03-03 19:35:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:39,201 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1072 transitions. [2022-03-03 19:35:39,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1072 transitions. [2022-03-03 19:35:39,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:39,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:39,201 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:39,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:39,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:39,402 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:39,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:39,402 INFO L85 PathProgramCache]: Analyzing trace with hash -477014994, now seen corresponding path program 43 times [2022-03-03 19:35:39,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:39,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777641647] [2022-03-03 19:35:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:39,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:39,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:39,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777641647] [2022-03-03 19:35:39,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777641647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:39,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938053675] [2022-03-03 19:35:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:35:39,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:39,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:39,676 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) [2022-03-03 19:35:39,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:35:39,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:39,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:40,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:40,069 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 27 treesize of output 13 [2022-03-03 19:35:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:40,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:40,605 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:40,605 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 42 treesize of output 60 [2022-03-03 19:35:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:40,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938053675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:40,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:40,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:40,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822839329] [2022-03-03 19:35:40,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:40,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:40,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:40,658 INFO L87 Difference]: Start difference. First operand 526 states and 1072 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:42,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:42,229 INFO L93 Difference]: Finished difference Result 822 states and 1634 transitions. [2022-03-03 19:35:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:35:42,229 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:42,231 INFO L225 Difference]: With dead ends: 822 [2022-03-03 19:35:42,231 INFO L226 Difference]: Without dead ends: 804 [2022-03-03 19:35:42,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1767 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=489, Invalid=5363, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:35:42,231 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 216 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:42,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 553 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1311 Invalid, 0 Unknown, 524 Unchecked, 0.5s Time] [2022-03-03 19:35:42,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-03-03 19:35:42,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 516. [2022-03-03 19:35:42,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0543689320388347) internal successors, (1058), 515 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1058 transitions. [2022-03-03 19:35:42,238 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1058 transitions. Word has length 33 [2022-03-03 19:35:42,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:42,238 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1058 transitions. [2022-03-03 19:35:42,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:42,238 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1058 transitions. [2022-03-03 19:35:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:42,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:42,239 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:42,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-03 19:35:42,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-03 19:35:42,439 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:42,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1268319898, now seen corresponding path program 44 times [2022-03-03 19:35:42,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:42,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162493351] [2022-03-03 19:35:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:42,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:42,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162493351] [2022-03-03 19:35:42,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162493351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:42,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143028715] [2022-03-03 19:35:42,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:35:42,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:42,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:42,721 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) [2022-03-03 19:35:42,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:35:42,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:35:42,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:42,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:42,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:43,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:43,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:43,112 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 27 treesize of output 13 [2022-03-03 19:35:43,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:43,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:43,641 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:43,642 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 42 treesize of output 60 [2022-03-03 19:35:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:43,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143028715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:43,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:43,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:43,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999998901] [2022-03-03 19:35:43,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:43,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:43,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:43,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:43,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:43,698 INFO L87 Difference]: Start difference. First operand 516 states and 1058 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:45,470 INFO L93 Difference]: Finished difference Result 773 states and 1559 transitions. [2022-03-03 19:35:45,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:35:45,471 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:45,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:45,472 INFO L225 Difference]: With dead ends: 773 [2022-03-03 19:35:45,472 INFO L226 Difference]: Without dead ends: 725 [2022-03-03 19:35:45,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=544, Invalid=5776, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:35:45,473 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 183 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:45,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 595 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1574 Invalid, 0 Unknown, 272 Unchecked, 0.6s Time] [2022-03-03 19:35:45,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-03-03 19:35:45,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 516. [2022-03-03 19:35:45,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0524271844660196) internal successors, (1057), 515 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:45,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1057 transitions. [2022-03-03 19:35:45,479 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1057 transitions. Word has length 33 [2022-03-03 19:35:45,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:45,479 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1057 transitions. [2022-03-03 19:35:45,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:45,479 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1057 transitions. [2022-03-03 19:35:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:45,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:45,480 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:45,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:45,691 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,SelfDestructingSolverStorable49 [2022-03-03 19:35:45,691 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1641024808, now seen corresponding path program 45 times [2022-03-03 19:35:45,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:45,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743236573] [2022-03-03 19:35:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:45,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:45,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743236573] [2022-03-03 19:35:45,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743236573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:45,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114783729] [2022-03-03 19:35:45,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:35:45,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:45,978 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) [2022-03-03 19:35:45,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:35:46,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:35:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:46,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:46,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:46,394 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 27 treesize of output 13 [2022-03-03 19:35:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:46,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:46,942 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:46,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:35:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:46,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114783729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:46,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:46,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:46,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805894150] [2022-03-03 19:35:46,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:46,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:46,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:46,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:46,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:46,997 INFO L87 Difference]: Start difference. First operand 516 states and 1057 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:49,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:49,111 INFO L93 Difference]: Finished difference Result 1126 states and 2249 transitions. [2022-03-03 19:35:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:35:49,112 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:49,113 INFO L225 Difference]: With dead ends: 1126 [2022-03-03 19:35:49,113 INFO L226 Difference]: Without dead ends: 1046 [2022-03-03 19:35:49,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=763, Invalid=8167, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:35:49,114 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 265 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1297 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 975 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:49,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 621 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1297 Invalid, 0 Unknown, 975 Unchecked, 0.5s Time] [2022-03-03 19:35:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-03 19:35:49,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 520. [2022-03-03 19:35:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 519 states have (on average 2.052023121387283) internal successors, (1065), 519 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:49,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1065 transitions. [2022-03-03 19:35:49,121 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1065 transitions. Word has length 33 [2022-03-03 19:35:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:49,121 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 1065 transitions. [2022-03-03 19:35:49,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1065 transitions. [2022-03-03 19:35:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:49,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:49,122 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:49,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-03 19:35:49,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:49,323 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:49,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:49,323 INFO L85 PathProgramCache]: Analyzing trace with hash -855893032, now seen corresponding path program 46 times [2022-03-03 19:35:49,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:49,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267333502] [2022-03-03 19:35:49,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:49,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:49,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:49,622 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:49,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267333502] [2022-03-03 19:35:49,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267333502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:49,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466561133] [2022-03-03 19:35:49,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:35:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:49,624 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) [2022-03-03 19:35:49,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:35:49,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:35:49,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:35:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:49,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:49,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:49,987 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 27 treesize of output 13 [2022-03-03 19:35:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:50,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:50,587 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:50,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:35:50,646 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:50,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466561133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:50,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:50,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:50,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261290637] [2022-03-03 19:35:50,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:50,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:50,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:50,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:50,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:50,648 INFO L87 Difference]: Start difference. First operand 520 states and 1065 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:54,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:54,006 INFO L93 Difference]: Finished difference Result 1128 states and 2270 transitions. [2022-03-03 19:35:54,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 19:35:54,007 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:54,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:54,016 INFO L225 Difference]: With dead ends: 1128 [2022-03-03 19:35:54,016 INFO L226 Difference]: Without dead ends: 1100 [2022-03-03 19:35:54,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1219, Invalid=9911, Unknown=0, NotChecked=0, Total=11130 [2022-03-03 19:35:54,018 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 366 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1096 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:54,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 697 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1673 Invalid, 0 Unknown, 1096 Unchecked, 0.6s Time] [2022-03-03 19:35:54,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-03-03 19:35:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 512. [2022-03-03 19:35:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 2.0469667318982387) internal successors, (1046), 511 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 1046 transitions. [2022-03-03 19:35:54,025 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 1046 transitions. Word has length 33 [2022-03-03 19:35:54,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:54,025 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 1046 transitions. [2022-03-03 19:35:54,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:54,025 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 1046 transitions. [2022-03-03 19:35:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:54,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:54,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:54,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:35:54,231 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,SelfDestructingSolverStorable51 [2022-03-03 19:35:54,232 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:54,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:54,232 INFO L85 PathProgramCache]: Analyzing trace with hash 161649500, now seen corresponding path program 47 times [2022-03-03 19:35:54,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:54,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272011690] [2022-03-03 19:35:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:54,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:54,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:54,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272011690] [2022-03-03 19:35:54,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272011690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:54,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914853880] [2022-03-03 19:35:54,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:35:54,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:54,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:54,524 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) [2022-03-03 19:35:54,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:35:54,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:35:54,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:54,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:35:54,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:54,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:54,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:54,939 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 25 treesize of output 13 [2022-03-03 19:35:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:55,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:55,480 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:35:55,480 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 42 treesize of output 60 [2022-03-03 19:35:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:55,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914853880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:55,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:55,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:35:55,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787183316] [2022-03-03 19:35:55,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:55,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:35:55,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:35:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:35:55,537 INFO L87 Difference]: Start difference. First operand 512 states and 1046 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:57,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:35:57,204 INFO L93 Difference]: Finished difference Result 842 states and 1670 transitions. [2022-03-03 19:35:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:35:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:35:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:35:57,206 INFO L225 Difference]: With dead ends: 842 [2022-03-03 19:35:57,206 INFO L226 Difference]: Without dead ends: 801 [2022-03-03 19:35:57,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 42 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1842 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=497, Invalid=5665, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:35:57,206 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 183 mSDsluCounter, 1067 mSDsCounter, 0 mSdLazyCounter, 1550 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:35:57,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 697 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1550 Invalid, 0 Unknown, 561 Unchecked, 0.5s Time] [2022-03-03 19:35:57,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-03-03 19:35:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 501. [2022-03-03 19:35:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.046) internal successors, (1023), 500 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1023 transitions. [2022-03-03 19:35:57,212 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1023 transitions. Word has length 33 [2022-03-03 19:35:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:35:57,212 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1023 transitions. [2022-03-03 19:35:57,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:35:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1023 transitions. [2022-03-03 19:35:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:35:57,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:35:57,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:35:57,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-03 19:35:57,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:57,427 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:35:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:35:57,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1448719524, now seen corresponding path program 48 times [2022-03-03 19:35:57,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:35:57,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156589367] [2022-03-03 19:35:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:35:57,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:35:57,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:35:57,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:57,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:35:57,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156589367] [2022-03-03 19:35:57,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156589367] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:35:57,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209756447] [2022-03-03 19:35:57,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:35:57,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:35:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:35:57,715 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) [2022-03-03 19:35:57,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:35:57,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:35:57,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:35:57,738 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:35:57,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:35:58,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:35:58,205 INFO L353 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2022-03-03 19:35:58,205 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 21 [2022-03-03 19:35:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:58,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:35:59,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:59,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:35:59,243 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:35:59,243 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 47 treesize of output 55 [2022-03-03 19:35:59,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:35:59,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209756447] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:35:59,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:35:59,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 52 [2022-03-03 19:35:59,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756394561] [2022-03-03 19:35:59,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:35:59,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-03 19:35:59,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:35:59,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-03 19:35:59,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2437, Unknown=0, NotChecked=0, Total=2756 [2022-03-03 19:35:59,348 INFO L87 Difference]: Start difference. First operand 501 states and 1023 transitions. Second operand has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:03,088 INFO L93 Difference]: Finished difference Result 876 states and 1742 transitions. [2022-03-03 19:36:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:36:03,088 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:03,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:03,089 INFO L225 Difference]: With dead ends: 876 [2022-03-03 19:36:03,089 INFO L226 Difference]: Without dead ends: 857 [2022-03-03 19:36:03,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3588 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1657, Invalid=12863, Unknown=0, NotChecked=0, Total=14520 [2022-03-03 19:36:03,090 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 360 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 607 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:03,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 626 Invalid, 2653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1915 Invalid, 0 Unknown, 607 Unchecked, 0.8s Time] [2022-03-03 19:36:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-03 19:36:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 492. [2022-03-03 19:36:03,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.0590631364562118) internal successors, (1011), 491 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1011 transitions. [2022-03-03 19:36:03,096 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1011 transitions. Word has length 33 [2022-03-03 19:36:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:03,096 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1011 transitions. [2022-03-03 19:36:03,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 52 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1011 transitions. [2022-03-03 19:36:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:03,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:03,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:03,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:03,312 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,SelfDestructingSolverStorable53 [2022-03-03 19:36:03,313 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash -790191306, now seen corresponding path program 49 times [2022-03-03 19:36:03,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:03,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664937347] [2022-03-03 19:36:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:03,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:03,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:03,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:03,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664937347] [2022-03-03 19:36:03,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664937347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:03,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483840975] [2022-03-03 19:36:03,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:36:03,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:03,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:03,598 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) [2022-03-03 19:36:03,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:36:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:03,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:03,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:04,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:04,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:04,020 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 27 treesize of output 13 [2022-03-03 19:36:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:04,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:04,605 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:04,606 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 42 treesize of output 60 [2022-03-03 19:36:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:04,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483840975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:04,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:04,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:04,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566589199] [2022-03-03 19:36:04,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:04,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:04,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:04,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:04,681 INFO L87 Difference]: Start difference. First operand 492 states and 1011 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:06,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:06,737 INFO L93 Difference]: Finished difference Result 967 states and 1947 transitions. [2022-03-03 19:36:06,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:36:06,737 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:06,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:06,739 INFO L225 Difference]: With dead ends: 967 [2022-03-03 19:36:06,739 INFO L226 Difference]: Without dead ends: 948 [2022-03-03 19:36:06,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2220 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=690, Invalid=6966, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:36:06,740 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 266 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 727 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:06,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 568 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1182 Invalid, 0 Unknown, 727 Unchecked, 0.5s Time] [2022-03-03 19:36:06,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-03-03 19:36:06,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 519. [2022-03-03 19:36:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 2.0463320463320462) internal successors, (1060), 518 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1060 transitions. [2022-03-03 19:36:06,747 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1060 transitions. Word has length 33 [2022-03-03 19:36:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:06,747 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1060 transitions. [2022-03-03 19:36:06,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1060 transitions. [2022-03-03 19:36:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:06,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:06,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:06,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:06,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-03 19:36:06,964 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1059334192, now seen corresponding path program 50 times [2022-03-03 19:36:06,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:06,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038971983] [2022-03-03 19:36:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:07,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:07,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038971983] [2022-03-03 19:36:07,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038971983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:07,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24992881] [2022-03-03 19:36:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:36:07,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:07,232 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) [2022-03-03 19:36:07,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:36:07,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:36:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:07,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:07,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:07,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:07,652 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 27 treesize of output 13 [2022-03-03 19:36:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:07,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:08,199 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:08,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:36:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:08,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24992881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:08,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:08,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:08,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216927338] [2022-03-03 19:36:08,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:08,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:08,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:08,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:08,249 INFO L87 Difference]: Start difference. First operand 519 states and 1060 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:10,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:10,238 INFO L93 Difference]: Finished difference Result 755 states and 1523 transitions. [2022-03-03 19:36:10,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:36:10,238 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:10,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:10,239 INFO L225 Difference]: With dead ends: 755 [2022-03-03 19:36:10,239 INFO L226 Difference]: Without dead ends: 714 [2022-03-03 19:36:10,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=613, Invalid=6193, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:36:10,240 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:10,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 641 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1735 Invalid, 0 Unknown, 108 Unchecked, 0.6s Time] [2022-03-03 19:36:10,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-03-03 19:36:10,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 492. [2022-03-03 19:36:10,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 491 states have (on average 2.0570264765784114) internal successors, (1010), 491 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:10,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 1010 transitions. [2022-03-03 19:36:10,245 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 1010 transitions. Word has length 33 [2022-03-03 19:36:10,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:10,245 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 1010 transitions. [2022-03-03 19:36:10,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:10,245 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 1010 transitions. [2022-03-03 19:36:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:10,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:10,246 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:10,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:10,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:10,446 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:10,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:10,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2088128440, now seen corresponding path program 51 times [2022-03-03 19:36:10,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:10,447 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942677866] [2022-03-03 19:36:10,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:10,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:10,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:10,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:10,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942677866] [2022-03-03 19:36:10,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942677866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:10,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312353544] [2022-03-03 19:36:10,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:36:10,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:10,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:10,732 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) [2022-03-03 19:36:10,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:36:10,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:36:10,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:10,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:11,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:11,128 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 27 treesize of output 13 [2022-03-03 19:36:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:11,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:11,671 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:11,671 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 42 treesize of output 60 [2022-03-03 19:36:11,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:11,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312353544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:11,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:11,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:11,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879241492] [2022-03-03 19:36:11,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:11,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:11,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:11,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:11,746 INFO L87 Difference]: Start difference. First operand 492 states and 1010 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:14,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:14,177 INFO L93 Difference]: Finished difference Result 1126 states and 2253 transitions. [2022-03-03 19:36:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:36:14,177 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:14,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:14,178 INFO L225 Difference]: With dead ends: 1126 [2022-03-03 19:36:14,178 INFO L226 Difference]: Without dead ends: 1050 [2022-03-03 19:36:14,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2715 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=763, Invalid=8357, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:36:14,179 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 284 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:14,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 746 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2080 Invalid, 0 Unknown, 873 Unchecked, 0.7s Time] [2022-03-03 19:36:14,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-03-03 19:36:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 486. [2022-03-03 19:36:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.051546391752577) internal successors, (995), 485 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 995 transitions. [2022-03-03 19:36:14,185 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 995 transitions. Word has length 33 [2022-03-03 19:36:14,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:14,185 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 995 transitions. [2022-03-03 19:36:14,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 995 transitions. [2022-03-03 19:36:14,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:14,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:14,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:14,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-03 19:36:14,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:14,395 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:14,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:14,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1545236932, now seen corresponding path program 52 times [2022-03-03 19:36:14,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:14,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830945905] [2022-03-03 19:36:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:14,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:14,652 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:14,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830945905] [2022-03-03 19:36:14,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830945905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:14,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92518320] [2022-03-03 19:36:14,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:36:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:14,654 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) [2022-03-03 19:36:14,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:36:14,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:36:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:15,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:15,069 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 27 treesize of output 13 [2022-03-03 19:36:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:15,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:15,609 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:15,610 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 42 treesize of output 60 [2022-03-03 19:36:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:15,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92518320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:15,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:15,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:15,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950448018] [2022-03-03 19:36:15,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:15,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:15,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:15,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:15,672 INFO L87 Difference]: Start difference. First operand 486 states and 995 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:17,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:17,188 INFO L93 Difference]: Finished difference Result 715 states and 1446 transitions. [2022-03-03 19:36:17,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:36:17,188 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:17,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:17,189 INFO L225 Difference]: With dead ends: 715 [2022-03-03 19:36:17,189 INFO L226 Difference]: Without dead ends: 679 [2022-03-03 19:36:17,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=468, Invalid=5082, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:36:17,189 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 341 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:17,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 597 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1462 Invalid, 0 Unknown, 341 Unchecked, 0.5s Time] [2022-03-03 19:36:17,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-03-03 19:36:17,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 497. [2022-03-03 19:36:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0463709677419355) internal successors, (1015), 496 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:17,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1015 transitions. [2022-03-03 19:36:17,195 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1015 transitions. Word has length 33 [2022-03-03 19:36:17,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:17,195 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1015 transitions. [2022-03-03 19:36:17,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:17,195 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1015 transitions. [2022-03-03 19:36:17,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:17,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:17,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:17,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:17,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:17,396 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:17,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 768850960, now seen corresponding path program 53 times [2022-03-03 19:36:17,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:17,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547179780] [2022-03-03 19:36:17,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:17,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:17,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547179780] [2022-03-03 19:36:17,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547179780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:17,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432760748] [2022-03-03 19:36:17,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:36:17,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:17,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:17,674 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) [2022-03-03 19:36:17,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:36:17,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:36:17,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:17,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:18,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:18,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:18,072 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 25 treesize of output 13 [2022-03-03 19:36:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:18,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:18,753 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:18,754 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 49 treesize of output 63 [2022-03-03 19:36:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:18,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432760748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:18,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:18,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:36:18,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695501189] [2022-03-03 19:36:18,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:18,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:36:18,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:18,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:36:18,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:36:18,807 INFO L87 Difference]: Start difference. First operand 497 states and 1015 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:20,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:20,599 INFO L93 Difference]: Finished difference Result 822 states and 1660 transitions. [2022-03-03 19:36:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:36:20,599 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:20,600 INFO L225 Difference]: With dead ends: 822 [2022-03-03 19:36:20,600 INFO L226 Difference]: Without dead ends: 773 [2022-03-03 19:36:20,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=526, Invalid=5954, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:36:20,601 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 1827 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 2363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 468 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:20,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 571 Invalid, 2363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1827 Invalid, 0 Unknown, 468 Unchecked, 0.6s Time] [2022-03-03 19:36:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-03-03 19:36:20,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 488. [2022-03-03 19:36:20,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 2.051334702258727) internal successors, (999), 487 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:20,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 999 transitions. [2022-03-03 19:36:20,606 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 999 transitions. Word has length 33 [2022-03-03 19:36:20,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:20,607 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 999 transitions. [2022-03-03 19:36:20,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:20,607 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 999 transitions. [2022-03-03 19:36:20,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:20,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:20,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:20,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:20,808 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,SelfDestructingSolverStorable58 [2022-03-03 19:36:20,808 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:20,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1364107774, now seen corresponding path program 54 times [2022-03-03 19:36:20,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:20,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069446245] [2022-03-03 19:36:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:21,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:21,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069446245] [2022-03-03 19:36:21,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069446245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:21,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009336260] [2022-03-03 19:36:21,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:36:21,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:21,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:21,090 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) [2022-03-03 19:36:21,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:36:21,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:36:21,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:21,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:21,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:21,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:21,488 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 27 treesize of output 13 [2022-03-03 19:36:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:21,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:22,026 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:22,027 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 42 treesize of output 60 [2022-03-03 19:36:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:22,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009336260] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:22,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:22,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:22,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093395749] [2022-03-03 19:36:22,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:22,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:22,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:22,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:22,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:22,075 INFO L87 Difference]: Start difference. First operand 488 states and 999 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:23,753 INFO L93 Difference]: Finished difference Result 762 states and 1540 transitions. [2022-03-03 19:36:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:36:23,753 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:23,754 INFO L225 Difference]: With dead ends: 762 [2022-03-03 19:36:23,754 INFO L226 Difference]: Without dead ends: 718 [2022-03-03 19:36:23,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=552, Invalid=5610, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:36:23,755 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 1793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:23,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 457 Invalid, 1793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1137 Invalid, 0 Unknown, 598 Unchecked, 0.4s Time] [2022-03-03 19:36:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-03 19:36:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 490. [2022-03-03 19:36:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.051124744376278) internal successors, (1003), 489 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:23,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1003 transitions. [2022-03-03 19:36:23,761 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1003 transitions. Word has length 33 [2022-03-03 19:36:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:23,761 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1003 transitions. [2022-03-03 19:36:23,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1003 transitions. [2022-03-03 19:36:23,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:23,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:23,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:23,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:23,968 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,SelfDestructingSolverStorable59 [2022-03-03 19:36:23,969 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:23,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash -253325246, now seen corresponding path program 55 times [2022-03-03 19:36:23,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:23,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195976228] [2022-03-03 19:36:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:24,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:24,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195976228] [2022-03-03 19:36:24,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195976228] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:24,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690675448] [2022-03-03 19:36:24,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:36:24,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:24,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:24,233 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) [2022-03-03 19:36:24,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:36:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:24,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:24,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:24,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:24,672 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-03-03 19:36:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:24,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:25,217 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:25,217 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 42 treesize of output 60 [2022-03-03 19:36:25,273 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:25,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690675448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:25,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:25,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:25,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303065335] [2022-03-03 19:36:25,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:25,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:25,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:25,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:25,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1466, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:25,275 INFO L87 Difference]: Start difference. First operand 490 states and 1003 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:27,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:27,107 INFO L93 Difference]: Finished difference Result 867 states and 1755 transitions. [2022-03-03 19:36:27,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:36:27,111 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:27,112 INFO L225 Difference]: With dead ends: 867 [2022-03-03 19:36:27,113 INFO L226 Difference]: Without dead ends: 831 [2022-03-03 19:36:27,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=573, Invalid=5747, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:36:27,113 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 189 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2102 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:27,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 586 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2102 Invalid, 0 Unknown, 312 Unchecked, 0.7s Time] [2022-03-03 19:36:27,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2022-03-03 19:36:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 491. [2022-03-03 19:36:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0510204081632653) internal successors, (1005), 490 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1005 transitions. [2022-03-03 19:36:27,119 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1005 transitions. Word has length 33 [2022-03-03 19:36:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:27,119 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1005 transitions. [2022-03-03 19:36:27,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1005 transitions. [2022-03-03 19:36:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:27,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:27,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:27,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:27,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:27,321 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:27,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2005218364, now seen corresponding path program 56 times [2022-03-03 19:36:27,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:27,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091842184] [2022-03-03 19:36:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:27,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:27,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:27,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091842184] [2022-03-03 19:36:27,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091842184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:27,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592742493] [2022-03-03 19:36:27,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:36:27,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:27,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:27,596 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) [2022-03-03 19:36:27,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:36:27,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:36:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:27,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:27,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:27,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:27,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:27,917 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 27 treesize of output 13 [2022-03-03 19:36:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:28,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:28,488 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:28,488 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 42 treesize of output 60 [2022-03-03 19:36:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:28,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592742493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:28,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:28,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:28,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502014857] [2022-03-03 19:36:28,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:28,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:28,534 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:28,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:28,535 INFO L87 Difference]: Start difference. First operand 491 states and 1005 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:30,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:30,333 INFO L93 Difference]: Finished difference Result 1006 states and 2031 transitions. [2022-03-03 19:36:30,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:36:30,333 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:30,334 INFO L225 Difference]: With dead ends: 1006 [2022-03-03 19:36:30,334 INFO L226 Difference]: Without dead ends: 974 [2022-03-03 19:36:30,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2161 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=726, Invalid=6756, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:36:30,335 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 141 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:30,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 480 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1387 Invalid, 0 Unknown, 310 Unchecked, 0.5s Time] [2022-03-03 19:36:30,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-03-03 19:36:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 505. [2022-03-03 19:36:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0496031746031744) internal successors, (1033), 504 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:30,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1033 transitions. [2022-03-03 19:36:30,341 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1033 transitions. Word has length 33 [2022-03-03 19:36:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:30,341 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1033 transitions. [2022-03-03 19:36:30,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1033 transitions. [2022-03-03 19:36:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:30,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:30,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:30,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:30,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:30,542 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:30,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:30,543 INFO L85 PathProgramCache]: Analyzing trace with hash -578975998, now seen corresponding path program 57 times [2022-03-03 19:36:30,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:30,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277422936] [2022-03-03 19:36:30,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:30,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:30,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:30,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277422936] [2022-03-03 19:36:30,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277422936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:30,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805200920] [2022-03-03 19:36:30,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:36:30,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:30,795 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) [2022-03-03 19:36:30,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:36:30,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:36:30,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:30,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:31,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:31,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:31,141 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 27 treesize of output 13 [2022-03-03 19:36:31,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:31,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:31,719 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:31,720 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 42 treesize of output 60 [2022-03-03 19:36:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:31,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805200920] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:31,773 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:31,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:31,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403984730] [2022-03-03 19:36:31,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:31,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:31,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:31,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:31,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1447, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:31,774 INFO L87 Difference]: Start difference. First operand 505 states and 1033 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:34,725 INFO L93 Difference]: Finished difference Result 1070 states and 2154 transitions. [2022-03-03 19:36:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:36:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:34,726 INFO L225 Difference]: With dead ends: 1070 [2022-03-03 19:36:34,726 INFO L226 Difference]: Without dead ends: 1038 [2022-03-03 19:36:34,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 41 SyntacticMatches, 19 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3671 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1130, Invalid=9790, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:36:34,727 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 276 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:34,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 485 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1601 Invalid, 0 Unknown, 226 Unchecked, 0.6s Time] [2022-03-03 19:36:34,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-03-03 19:36:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 487. [2022-03-03 19:36:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.051440329218107) internal successors, (997), 486 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 997 transitions. [2022-03-03 19:36:34,734 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 997 transitions. Word has length 33 [2022-03-03 19:36:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:34,734 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 997 transitions. [2022-03-03 19:36:34,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 997 transitions. [2022-03-03 19:36:34,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:34,734 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:34,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:34,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:34,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:34,936 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2121073394, now seen corresponding path program 58 times [2022-03-03 19:36:34,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:34,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043152131] [2022-03-03 19:36:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:35,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:35,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043152131] [2022-03-03 19:36:35,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043152131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:35,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598689358] [2022-03-03 19:36:35,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:36:35,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:35,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:35,222 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) [2022-03-03 19:36:35,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:36:35,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:36:35,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:35,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:35,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:35,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:35,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:35,626 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 27 treesize of output 13 [2022-03-03 19:36:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:35,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:36,182 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:36,182 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 42 treesize of output 60 [2022-03-03 19:36:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:36,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598689358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:36,228 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:36,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:36,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817731176] [2022-03-03 19:36:36,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:36,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:36,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:36,232 INFO L87 Difference]: Start difference. First operand 487 states and 997 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:37,853 INFO L93 Difference]: Finished difference Result 767 states and 1532 transitions. [2022-03-03 19:36:37,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:36:37,853 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:37,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:37,854 INFO L225 Difference]: With dead ends: 767 [2022-03-03 19:36:37,854 INFO L226 Difference]: Without dead ends: 683 [2022-03-03 19:36:37,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=506, Invalid=5500, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:36:37,855 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 195 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:37,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 500 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1473 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2022-03-03 19:36:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-03 19:36:37,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 491. [2022-03-03 19:36:37,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.0510204081632653) internal successors, (1005), 490 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1005 transitions. [2022-03-03 19:36:37,861 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1005 transitions. Word has length 33 [2022-03-03 19:36:37,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:37,861 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1005 transitions. [2022-03-03 19:36:37,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:37,861 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1005 transitions. [2022-03-03 19:36:37,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:37,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:37,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:37,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:38,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:38,076 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:38,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:38,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1479962804, now seen corresponding path program 59 times [2022-03-03 19:36:38,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:38,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489560449] [2022-03-03 19:36:38,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:38,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:38,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:38,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489560449] [2022-03-03 19:36:38,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489560449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:38,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915531333] [2022-03-03 19:36:38,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:36:38,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:38,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:38,352 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) [2022-03-03 19:36:38,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:36:38,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:36:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:38,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:36:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:38,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:38,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:38,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:38,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:38,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2022-03-03 19:36:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:38,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:39,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:39,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:39,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:36:39,371 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 42 treesize of output 54 [2022-03-03 19:36:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:39,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915531333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:39,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:39,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 45 [2022-03-03 19:36:39,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004209083] [2022-03-03 19:36:39,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:39,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:36:39,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:39,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:36:39,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:36:39,465 INFO L87 Difference]: Start difference. First operand 491 states and 1005 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:44,303 INFO L93 Difference]: Finished difference Result 1473 states and 2923 transitions. [2022-03-03 19:36:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-03-03 19:36:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:44,305 INFO L225 Difference]: With dead ends: 1473 [2022-03-03 19:36:44,310 INFO L226 Difference]: Without dead ends: 1313 [2022-03-03 19:36:44,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6704 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2435, Invalid=19321, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 19:36:44,311 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 404 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 3438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 515 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:44,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 818 Invalid, 3438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2700 Invalid, 0 Unknown, 515 Unchecked, 1.0s Time] [2022-03-03 19:36:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2022-03-03 19:36:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 511. [2022-03-03 19:36:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.052941176470588) internal successors, (1047), 510 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1047 transitions. [2022-03-03 19:36:44,320 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1047 transitions. Word has length 33 [2022-03-03 19:36:44,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:44,320 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1047 transitions. [2022-03-03 19:36:44,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:44,320 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1047 transitions. [2022-03-03 19:36:44,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:44,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:44,321 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:44,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:44,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-03 19:36:44,522 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:44,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1388762126, now seen corresponding path program 60 times [2022-03-03 19:36:44,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:44,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558702858] [2022-03-03 19:36:44,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:44,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:44,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:44,785 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:44,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:44,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558702858] [2022-03-03 19:36:44,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558702858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:44,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220675894] [2022-03-03 19:36:44,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:36:44,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:44,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:44,787 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) [2022-03-03 19:36:44,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:36:44,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:36:44,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:44,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:36:44,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:45,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:45,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:45,141 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 25 treesize of output 13 [2022-03-03 19:36:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:45,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:45,731 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:45,731 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 42 treesize of output 60 [2022-03-03 19:36:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:45,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220675894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:45,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:45,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:45,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552971937] [2022-03-03 19:36:45,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:45,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:45,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:45,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:45,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1448, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:45,784 INFO L87 Difference]: Start difference. First operand 511 states and 1047 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:48,517 INFO L93 Difference]: Finished difference Result 1016 states and 2049 transitions. [2022-03-03 19:36:48,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:36:48,518 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:48,519 INFO L225 Difference]: With dead ends: 1016 [2022-03-03 19:36:48,519 INFO L226 Difference]: Without dead ends: 980 [2022-03-03 19:36:48,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1071, Invalid=9641, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:36:48,520 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 292 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:48,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 466 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1723 Invalid, 0 Unknown, 97 Unchecked, 0.6s Time] [2022-03-03 19:36:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-03-03 19:36:48,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 506. [2022-03-03 19:36:48,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.0514851485148515) internal successors, (1036), 505 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1036 transitions. [2022-03-03 19:36:48,527 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1036 transitions. Word has length 33 [2022-03-03 19:36:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:48,527 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1036 transitions. [2022-03-03 19:36:48,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1036 transitions. [2022-03-03 19:36:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:48,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:48,528 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:48,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:36:48,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:48,739 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:48,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:48,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1493608744, now seen corresponding path program 61 times [2022-03-03 19:36:48,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:48,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490564701] [2022-03-03 19:36:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:48,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:49,001 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:49,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490564701] [2022-03-03 19:36:49,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490564701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:49,001 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533223212] [2022-03-03 19:36:49,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:36:49,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:49,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:49,003 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) [2022-03-03 19:36:49,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:36:49,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:49,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:49,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:49,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:49,301 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 27 treesize of output 13 [2022-03-03 19:36:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:49,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:49,904 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:49,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:36:49,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:49,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533223212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:49,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:49,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:49,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669066953] [2022-03-03 19:36:49,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:49,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:49,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:49,965 INFO L87 Difference]: Start difference. First operand 506 states and 1036 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:51,715 INFO L93 Difference]: Finished difference Result 935 states and 1895 transitions. [2022-03-03 19:36:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:36:51,715 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:51,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:51,716 INFO L225 Difference]: With dead ends: 935 [2022-03-03 19:36:51,716 INFO L226 Difference]: Without dead ends: 907 [2022-03-03 19:36:51,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=545, Invalid=5461, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:36:51,717 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 2061 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:51,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 599 Invalid, 2475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2061 Invalid, 0 Unknown, 350 Unchecked, 0.7s Time] [2022-03-03 19:36:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-03 19:36:51,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 498. [2022-03-03 19:36:51,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 497 states have (on average 2.052313883299799) internal successors, (1020), 497 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:51,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 1020 transitions. [2022-03-03 19:36:51,723 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 1020 transitions. Word has length 33 [2022-03-03 19:36:51,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:51,723 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 1020 transitions. [2022-03-03 19:36:51,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:51,723 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 1020 transitions. [2022-03-03 19:36:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:51,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:51,724 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:51,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-03 19:36:51,927 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,SelfDestructingSolverStorable66 [2022-03-03 19:36:51,927 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:51,927 INFO L85 PathProgramCache]: Analyzing trace with hash 983015062, now seen corresponding path program 62 times [2022-03-03 19:36:51,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:51,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479072752] [2022-03-03 19:36:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:52,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:52,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479072752] [2022-03-03 19:36:52,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479072752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:52,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849829498] [2022-03-03 19:36:52,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:36:52,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:52,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:52,198 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) [2022-03-03 19:36:52,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:36:52,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:36:52,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:52,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:52,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:52,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:52,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:52,603 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 27 treesize of output 13 [2022-03-03 19:36:52,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:52,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:53,135 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:53,135 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 42 treesize of output 60 [2022-03-03 19:36:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:53,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849829498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:53,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:53,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:53,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254147322] [2022-03-03 19:36:53,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:53,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:53,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:53,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:53,185 INFO L87 Difference]: Start difference. First operand 498 states and 1020 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:54,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:54,871 INFO L93 Difference]: Finished difference Result 711 states and 1434 transitions. [2022-03-03 19:36:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:36:54,871 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:54,872 INFO L225 Difference]: With dead ends: 711 [2022-03-03 19:36:54,872 INFO L226 Difference]: Without dead ends: 669 [2022-03-03 19:36:54,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=5470, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:36:54,873 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:54,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 482 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1407 Invalid, 0 Unknown, 175 Unchecked, 0.5s Time] [2022-03-03 19:36:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2022-03-03 19:36:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 505. [2022-03-03 19:36:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0456349206349205) internal successors, (1031), 504 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1031 transitions. [2022-03-03 19:36:54,878 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1031 transitions. Word has length 33 [2022-03-03 19:36:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:54,878 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1031 transitions. [2022-03-03 19:36:54,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1031 transitions. [2022-03-03 19:36:54,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:54,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:54,879 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:54,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:55,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-03 19:36:55,081 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:55,081 INFO L85 PathProgramCache]: Analyzing trace with hash 206629090, now seen corresponding path program 63 times [2022-03-03 19:36:55,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:55,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813324973] [2022-03-03 19:36:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:55,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:55,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:55,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813324973] [2022-03-03 19:36:55,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813324973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:55,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673652602] [2022-03-03 19:36:55,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:36:55,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:55,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:55,338 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) [2022-03-03 19:36:55,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:36:55,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:36:55,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:55,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:55,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:55,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:55,762 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 27 treesize of output 13 [2022-03-03 19:36:55,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:55,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:56,303 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:56,303 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 42 treesize of output 60 [2022-03-03 19:36:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:56,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673652602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:56,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:56,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:56,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74745470] [2022-03-03 19:36:56,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:56,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:56,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:56,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:56,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:56,354 INFO L87 Difference]: Start difference. First operand 505 states and 1031 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:36:58,013 INFO L93 Difference]: Finished difference Result 771 states and 1553 transitions. [2022-03-03 19:36:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:36:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:36:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:36:58,014 INFO L225 Difference]: With dead ends: 771 [2022-03-03 19:36:58,014 INFO L226 Difference]: Without dead ends: 754 [2022-03-03 19:36:58,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1805 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=539, Invalid=5467, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:36:58,015 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 173 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:36:58,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 419 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1271 Invalid, 0 Unknown, 363 Unchecked, 0.5s Time] [2022-03-03 19:36:58,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2022-03-03 19:36:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 501. [2022-03-03 19:36:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.05) internal successors, (1025), 500 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1025 transitions. [2022-03-03 19:36:58,020 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1025 transitions. Word has length 33 [2022-03-03 19:36:58,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:36:58,020 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1025 transitions. [2022-03-03 19:36:58,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:36:58,021 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1025 transitions. [2022-03-03 19:36:58,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:36:58,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:36:58,021 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:36:58,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:36:58,222 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,SelfDestructingSolverStorable68 [2022-03-03 19:36:58,222 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:36:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:36:58,222 INFO L85 PathProgramCache]: Analyzing trace with hash 690032350, now seen corresponding path program 64 times [2022-03-03 19:36:58,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:36:58,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775278009] [2022-03-03 19:36:58,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:36:58,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:36:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:36:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:58,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:36:58,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775278009] [2022-03-03 19:36:58,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775278009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:36:58,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221080122] [2022-03-03 19:36:58,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:36:58,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:36:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:36:58,493 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) [2022-03-03 19:36:58,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:36:58,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:36:58,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:36:58,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:36:58,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:36:58,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:36:58,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:36:58,879 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 27 treesize of output 13 [2022-03-03 19:36:59,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:59,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:36:59,414 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:36:59,414 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 42 treesize of output 60 [2022-03-03 19:36:59,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:36:59,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221080122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:36:59,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:36:59,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:36:59,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077212015] [2022-03-03 19:36:59,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:36:59,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:36:59,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:36:59,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:36:59,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:36:59,465 INFO L87 Difference]: Start difference. First operand 501 states and 1025 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:01,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:01,283 INFO L93 Difference]: Finished difference Result 779 states and 1573 transitions. [2022-03-03 19:37:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:37:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:01,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:01,284 INFO L225 Difference]: With dead ends: 779 [2022-03-03 19:37:01,284 INFO L226 Difference]: Without dead ends: 740 [2022-03-03 19:37:01,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=539, Invalid=5467, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:37:01,285 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 165 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:01,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 619 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1900 Invalid, 0 Unknown, 299 Unchecked, 0.7s Time] [2022-03-03 19:37:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-03-03 19:37:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 499. [2022-03-03 19:37:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0522088353413657) internal successors, (1022), 498 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1022 transitions. [2022-03-03 19:37:01,290 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1022 transitions. Word has length 33 [2022-03-03 19:37:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:01,291 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1022 transitions. [2022-03-03 19:37:01,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1022 transitions. [2022-03-03 19:37:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:01,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:01,291 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:01,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-03 19:37:01,492 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,SelfDestructingSolverStorable69 [2022-03-03 19:37:01,492 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1926329644, now seen corresponding path program 65 times [2022-03-03 19:37:01,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:01,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801585697] [2022-03-03 19:37:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:01,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:01,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:01,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801585697] [2022-03-03 19:37:01,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801585697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:01,771 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482552050] [2022-03-03 19:37:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:01,772 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) [2022-03-03 19:37:01,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:37:01,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:37:01,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:01,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:37:01,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:02,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:02,158 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 25 treesize of output 13 [2022-03-03 19:37:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:02,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:02,699 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:02,700 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 42 treesize of output 60 [2022-03-03 19:37:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:02,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482552050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:02,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:02,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:02,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879374716] [2022-03-03 19:37:02,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:02,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:02,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:02,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:02,754 INFO L87 Difference]: Start difference. First operand 499 states and 1022 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:04,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:04,631 INFO L93 Difference]: Finished difference Result 688 states and 1386 transitions. [2022-03-03 19:37:04,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:37:04,631 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:04,632 INFO L225 Difference]: With dead ends: 688 [2022-03-03 19:37:04,632 INFO L226 Difference]: Without dead ends: 644 [2022-03-03 19:37:04,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1855 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=569, Invalid=5751, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:37:04,632 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 290 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:04,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 511 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1427 Invalid, 0 Unknown, 290 Unchecked, 0.5s Time] [2022-03-03 19:37:04,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2022-03-03 19:37:04,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 500. [2022-03-03 19:37:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0521042084168335) internal successors, (1024), 499 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1024 transitions. [2022-03-03 19:37:04,638 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1024 transitions. Word has length 33 [2022-03-03 19:37:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:04,638 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1024 transitions. [2022-03-03 19:37:04,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1024 transitions. [2022-03-03 19:37:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:04,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:04,639 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:04,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-03 19:37:04,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:04,841 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:04,841 INFO L85 PathProgramCache]: Analyzing trace with hash 951990102, now seen corresponding path program 66 times [2022-03-03 19:37:04,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:04,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794368062] [2022-03-03 19:37:04,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:04,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:05,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:05,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794368062] [2022-03-03 19:37:05,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794368062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:05,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946361705] [2022-03-03 19:37:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:05,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:05,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:05,124 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) [2022-03-03 19:37:05,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:37:05,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:37:05,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:05,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:05,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:05,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:05,570 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 25 treesize of output 13 [2022-03-03 19:37:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:05,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:06,216 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:06,216 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 47 treesize of output 63 [2022-03-03 19:37:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:06,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946361705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:06,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:06,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:37:06,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956793725] [2022-03-03 19:37:06,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:06,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:37:06,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:37:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1766, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:37:06,266 INFO L87 Difference]: Start difference. First operand 500 states and 1024 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:08,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:08,149 INFO L93 Difference]: Finished difference Result 957 states and 1927 transitions. [2022-03-03 19:37:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:37:08,150 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:08,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:08,151 INFO L225 Difference]: With dead ends: 957 [2022-03-03 19:37:08,151 INFO L226 Difference]: Without dead ends: 916 [2022-03-03 19:37:08,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=619, Invalid=5701, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:37:08,151 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 228 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 512 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:08,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 504 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1392 Invalid, 0 Unknown, 512 Unchecked, 0.5s Time] [2022-03-03 19:37:08,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-03-03 19:37:08,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 502. [2022-03-03 19:37:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.0518962075848304) internal successors, (1028), 501 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:08,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1028 transitions. [2022-03-03 19:37:08,157 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1028 transitions. Word has length 33 [2022-03-03 19:37:08,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:08,157 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1028 transitions. [2022-03-03 19:37:08,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:08,157 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1028 transitions. [2022-03-03 19:37:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:08,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:08,158 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:08,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-03 19:37:08,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:08,365 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:08,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:08,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1727527062, now seen corresponding path program 67 times [2022-03-03 19:37:08,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:08,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681964420] [2022-03-03 19:37:08,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:08,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:08,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:08,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681964420] [2022-03-03 19:37:08,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681964420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:08,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296072219] [2022-03-03 19:37:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:08,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:08,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:08,628 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) [2022-03-03 19:37:08,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:37:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:08,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:08,943 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 27 treesize of output 13 [2022-03-03 19:37:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:09,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:09,540 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:09,540 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 42 treesize of output 60 [2022-03-03 19:37:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:09,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296072219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:09,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:09,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:09,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959271447] [2022-03-03 19:37:09,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:09,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:09,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1450, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:09,595 INFO L87 Difference]: Start difference. First operand 502 states and 1028 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:12,177 INFO L93 Difference]: Finished difference Result 908 states and 1836 transitions. [2022-03-03 19:37:12,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:37:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:12,178 INFO L225 Difference]: With dead ends: 908 [2022-03-03 19:37:12,178 INFO L226 Difference]: Without dead ends: 876 [2022-03-03 19:37:12,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=887, Invalid=7855, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:37:12,179 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 240 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 2440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:12,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 499 Invalid, 2440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1829 Invalid, 0 Unknown, 480 Unchecked, 0.7s Time] [2022-03-03 19:37:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-03-03 19:37:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 500. [2022-03-03 19:37:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 499 states have (on average 2.0521042084168335) internal successors, (1024), 499 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:12,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 1024 transitions. [2022-03-03 19:37:12,185 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 1024 transitions. Word has length 33 [2022-03-03 19:37:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:12,185 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 1024 transitions. [2022-03-03 19:37:12,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 1024 transitions. [2022-03-03 19:37:12,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:12,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:12,186 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:12,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-03 19:37:12,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:12,386 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:12,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1141197868, now seen corresponding path program 68 times [2022-03-03 19:37:12,387 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:12,387 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214639082] [2022-03-03 19:37:12,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:12,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:12,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:12,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214639082] [2022-03-03 19:37:12,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214639082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:12,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143378229] [2022-03-03 19:37:12,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:12,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:12,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:12,639 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) [2022-03-03 19:37:12,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:37:12,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:12,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:12,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:12,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:12,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:12,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:12,958 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 27 treesize of output 13 [2022-03-03 19:37:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:13,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:13,543 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:13,543 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 42 treesize of output 60 [2022-03-03 19:37:13,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:13,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143378229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:13,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:13,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:13,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968364361] [2022-03-03 19:37:13,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:13,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:13,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:13,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:13,594 INFO L87 Difference]: Start difference. First operand 500 states and 1024 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:17,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:17,396 INFO L93 Difference]: Finished difference Result 1088 states and 2173 transitions. [2022-03-03 19:37:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 19:37:17,397 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:17,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:17,398 INFO L225 Difference]: With dead ends: 1088 [2022-03-03 19:37:17,398 INFO L226 Difference]: Without dead ends: 995 [2022-03-03 19:37:17,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4619 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1466, Invalid=12814, Unknown=0, NotChecked=0, Total=14280 [2022-03-03 19:37:17,399 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 386 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 3015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:17,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 579 Invalid, 3015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2293 Invalid, 0 Unknown, 518 Unchecked, 0.9s Time] [2022-03-03 19:37:17,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-03 19:37:17,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 504. [2022-03-03 19:37:17,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.0536779324055665) internal successors, (1033), 503 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:17,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1033 transitions. [2022-03-03 19:37:17,405 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1033 transitions. Word has length 33 [2022-03-03 19:37:17,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:17,406 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1033 transitions. [2022-03-03 19:37:17,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:17,406 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1033 transitions. [2022-03-03 19:37:17,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:17,406 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:17,406 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:17,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:17,615 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,SelfDestructingSolverStorable73 [2022-03-03 19:37:17,615 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:17,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:17,616 INFO L85 PathProgramCache]: Analyzing trace with hash 142203974, now seen corresponding path program 69 times [2022-03-03 19:37:17,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:17,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043997319] [2022-03-03 19:37:17,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:17,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:17,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:17,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043997319] [2022-03-03 19:37:17,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043997319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:17,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826359874] [2022-03-03 19:37:17,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:17,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:17,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:17,899 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) [2022-03-03 19:37:17,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:37:17,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:37:17,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:17,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:18,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:18,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:18,312 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 27 treesize of output 13 [2022-03-03 19:37:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:18,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:18,864 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:18,864 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 42 treesize of output 60 [2022-03-03 19:37:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:18,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826359874] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:18,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:18,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:18,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393182856] [2022-03-03 19:37:18,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:18,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:18,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:18,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:18,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:18,922 INFO L87 Difference]: Start difference. First operand 504 states and 1033 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:20,858 INFO L93 Difference]: Finished difference Result 932 states and 1863 transitions. [2022-03-03 19:37:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:37:20,858 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:20,859 INFO L225 Difference]: With dead ends: 932 [2022-03-03 19:37:20,859 INFO L226 Difference]: Without dead ends: 853 [2022-03-03 19:37:20,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=654, Invalid=6656, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:37:20,860 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 224 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:20,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 470 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1483 Invalid, 0 Unknown, 340 Unchecked, 0.5s Time] [2022-03-03 19:37:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-03-03 19:37:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 517. [2022-03-03 19:37:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 2.0426356589147288) internal successors, (1054), 516 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1054 transitions. [2022-03-03 19:37:20,866 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1054 transitions. Word has length 33 [2022-03-03 19:37:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:20,866 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1054 transitions. [2022-03-03 19:37:20,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:20,866 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1054 transitions. [2022-03-03 19:37:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:20,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:20,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:20,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-03 19:37:21,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:21,067 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:21,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1348678666, now seen corresponding path program 70 times [2022-03-03 19:37:21,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:21,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044362376] [2022-03-03 19:37:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:21,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:21,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:21,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044362376] [2022-03-03 19:37:21,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044362376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:21,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406855566] [2022-03-03 19:37:21,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:21,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:21,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:21,333 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) [2022-03-03 19:37:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:37:21,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:21,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:21,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:21,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:21,715 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 27 treesize of output 13 [2022-03-03 19:37:21,865 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:21,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:22,269 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:22,269 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 42 treesize of output 60 [2022-03-03 19:37:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:22,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406855566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:22,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:22,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:22,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857372957] [2022-03-03 19:37:22,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:22,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:22,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:22,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:22,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:22,325 INFO L87 Difference]: Start difference. First operand 517 states and 1054 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:23,940 INFO L93 Difference]: Finished difference Result 913 states and 1843 transitions. [2022-03-03 19:37:23,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:37:23,941 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:23,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:23,942 INFO L225 Difference]: With dead ends: 913 [2022-03-03 19:37:23,942 INFO L226 Difference]: Without dead ends: 876 [2022-03-03 19:37:23,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=552, Invalid=5454, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:37:23,942 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 192 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 1291 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 1391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:23,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 326 Invalid, 1391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1291 Invalid, 0 Unknown, 11 Unchecked, 0.5s Time] [2022-03-03 19:37:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2022-03-03 19:37:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 508. [2022-03-03 19:37:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.04930966469428) internal successors, (1039), 507 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1039 transitions. [2022-03-03 19:37:23,948 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1039 transitions. Word has length 33 [2022-03-03 19:37:23,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:23,948 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1039 transitions. [2022-03-03 19:37:23,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1039 transitions. [2022-03-03 19:37:23,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:23,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:23,949 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:23,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-03 19:37:24,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:24,150 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1950983996, now seen corresponding path program 71 times [2022-03-03 19:37:24,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:24,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671798152] [2022-03-03 19:37:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:24,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:24,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:24,436 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:24,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671798152] [2022-03-03 19:37:24,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671798152] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:24,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877747005] [2022-03-03 19:37:24,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:24,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:24,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:24,437 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) [2022-03-03 19:37:24,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:37:24,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:37:24,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:24,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:37:24,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:24,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:24,752 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 25 treesize of output 13 [2022-03-03 19:37:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:24,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:25,328 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:25,328 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 42 treesize of output 60 [2022-03-03 19:37:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:25,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877747005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:25,390 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:25,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:25,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323213683] [2022-03-03 19:37:25,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:25,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:25,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:25,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:25,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:25,391 INFO L87 Difference]: Start difference. First operand 508 states and 1039 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:27,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:27,905 INFO L93 Difference]: Finished difference Result 903 states and 1824 transitions. [2022-03-03 19:37:27,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:37:27,905 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:27,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:27,906 INFO L225 Difference]: With dead ends: 903 [2022-03-03 19:37:27,906 INFO L226 Difference]: Without dead ends: 871 [2022-03-03 19:37:27,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 12 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2672 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=896, Invalid=7846, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:37:27,907 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1848 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:27,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 392 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1848 Invalid, 0 Unknown, 64 Unchecked, 0.7s Time] [2022-03-03 19:37:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-03-03 19:37:27,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 497. [2022-03-03 19:37:27,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2022-03-03 19:37:27,913 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2022-03-03 19:37:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:27,913 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2022-03-03 19:37:27,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2022-03-03 19:37:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:27,914 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:27,914 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:27,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:37:28,114 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,SelfDestructingSolverStorable76 [2022-03-03 19:37:28,114 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:28,115 INFO L85 PathProgramCache]: Analyzing trace with hash -222286980, now seen corresponding path program 72 times [2022-03-03 19:37:28,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:28,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566190991] [2022-03-03 19:37:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:28,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:28,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:28,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566190991] [2022-03-03 19:37:28,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566190991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:28,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251167244] [2022-03-03 19:37:28,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:28,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:28,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:28,371 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) [2022-03-03 19:37:28,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:37:28,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:37:28,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:28,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:37:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:28,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:28,664 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 25 treesize of output 13 [2022-03-03 19:37:28,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:28,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:29,268 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:29,269 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 42 treesize of output 60 [2022-03-03 19:37:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:29,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251167244] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:29,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:29,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:29,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80219373] [2022-03-03 19:37:29,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:29,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:29,312 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:29,312 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:31,114 INFO L93 Difference]: Finished difference Result 831 states and 1671 transitions. [2022-03-03 19:37:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:37:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:31,115 INFO L225 Difference]: With dead ends: 831 [2022-03-03 19:37:31,115 INFO L226 Difference]: Without dead ends: 799 [2022-03-03 19:37:31,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=637, Invalid=5843, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:37:31,116 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 179 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:31,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 396 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1654 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2022-03-03 19:37:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-03-03 19:37:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 499. [2022-03-03 19:37:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0481927710843375) internal successors, (1020), 498 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1020 transitions. [2022-03-03 19:37:31,122 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1020 transitions. Word has length 33 [2022-03-03 19:37:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:31,122 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1020 transitions. [2022-03-03 19:37:31,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:31,122 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1020 transitions. [2022-03-03 19:37:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:31,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:31,123 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:31,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:31,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-03 19:37:31,323 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1203955386, now seen corresponding path program 73 times [2022-03-03 19:37:31,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:31,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501110751] [2022-03-03 19:37:31,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:31,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:31,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:31,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:31,579 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501110751] [2022-03-03 19:37:31,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501110751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:31,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700720746] [2022-03-03 19:37:31,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:31,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:31,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:31,581 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) [2022-03-03 19:37:31,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:37:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:31,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:31,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:31,882 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 27 treesize of output 13 [2022-03-03 19:37:32,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:32,502 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:32,502 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 42 treesize of output 60 [2022-03-03 19:37:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700720746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:32,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:32,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:32,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567496787] [2022-03-03 19:37:32,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:32,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:32,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:32,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:32,549 INFO L87 Difference]: Start difference. First operand 499 states and 1020 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:34,977 INFO L93 Difference]: Finished difference Result 823 states and 1654 transitions. [2022-03-03 19:37:34,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:37:34,977 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:34,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:34,978 INFO L225 Difference]: With dead ends: 823 [2022-03-03 19:37:34,978 INFO L226 Difference]: Without dead ends: 795 [2022-03-03 19:37:34,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=864, Invalid=7692, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:37:34,979 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 196 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2140 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 2320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:34,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 437 Invalid, 2320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2140 Invalid, 0 Unknown, 81 Unchecked, 0.8s Time] [2022-03-03 19:37:34,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-03-03 19:37:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 494. [2022-03-03 19:37:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.04868154158215) internal successors, (1010), 493 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1010 transitions. [2022-03-03 19:37:34,985 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1010 transitions. Word has length 33 [2022-03-03 19:37:34,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:34,985 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1010 transitions. [2022-03-03 19:37:34,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:34,985 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1010 transitions. [2022-03-03 19:37:34,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:34,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:34,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:35,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:35,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:35,201 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:35,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2055830614, now seen corresponding path program 74 times [2022-03-03 19:37:35,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:35,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704525214] [2022-03-03 19:37:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:35,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:35,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704525214] [2022-03-03 19:37:35,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704525214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:35,453 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324402487] [2022-03-03 19:37:35,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:35,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:35,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:35,454 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) [2022-03-03 19:37:35,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:37:35,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:35,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:35,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:37:35,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:35,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:35,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:35,739 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 27 treesize of output 13 [2022-03-03 19:37:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:36,354 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:36,354 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 42 treesize of output 60 [2022-03-03 19:37:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324402487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:36,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:36,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:36,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082207844] [2022-03-03 19:37:36,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:36,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:36,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:36,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:36,407 INFO L87 Difference]: Start difference. First operand 494 states and 1010 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:38,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:38,831 INFO L93 Difference]: Finished difference Result 770 states and 1541 transitions. [2022-03-03 19:37:38,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:37:38,831 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:38,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:38,832 INFO L225 Difference]: With dead ends: 770 [2022-03-03 19:37:38,832 INFO L226 Difference]: Without dead ends: 721 [2022-03-03 19:37:38,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=803, Invalid=7387, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:37:38,833 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 183 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:38,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 613 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2579 Invalid, 0 Unknown, 162 Unchecked, 0.9s Time] [2022-03-03 19:37:38,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-03-03 19:37:38,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 489. [2022-03-03 19:37:38,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.0512295081967213) internal successors, (1001), 488 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:38,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1001 transitions. [2022-03-03 19:37:38,838 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1001 transitions. Word has length 33 [2022-03-03 19:37:38,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:38,838 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1001 transitions. [2022-03-03 19:37:38,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:38,838 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1001 transitions. [2022-03-03 19:37:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:38,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:38,839 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:38,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:39,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:39,039 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -246578804, now seen corresponding path program 75 times [2022-03-03 19:37:39,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:39,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907404994] [2022-03-03 19:37:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:39,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:39,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907404994] [2022-03-03 19:37:39,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907404994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:39,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313756930] [2022-03-03 19:37:39,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:39,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:39,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:39,300 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) [2022-03-03 19:37:39,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:37:39,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:37:39,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:39,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:39,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:39,688 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 27 treesize of output 13 [2022-03-03 19:37:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:39,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:40,222 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:40,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:37:40,272 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:40,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313756930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:40,272 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:40,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:40,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014592204] [2022-03-03 19:37:40,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:40,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:40,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:40,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:40,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:40,273 INFO L87 Difference]: Start difference. First operand 489 states and 1001 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:41,876 INFO L93 Difference]: Finished difference Result 876 states and 1750 transitions. [2022-03-03 19:37:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:37:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:41,878 INFO L225 Difference]: With dead ends: 876 [2022-03-03 19:37:41,878 INFO L226 Difference]: Without dead ends: 828 [2022-03-03 19:37:41,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1879 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=493, Invalid=5669, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:37:41,878 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 217 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1736 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:41,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 635 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1736 Invalid, 0 Unknown, 670 Unchecked, 0.6s Time] [2022-03-03 19:37:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-03-03 19:37:41,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 501. [2022-03-03 19:37:41,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.056) internal successors, (1028), 500 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1028 transitions. [2022-03-03 19:37:41,884 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1028 transitions. Word has length 33 [2022-03-03 19:37:41,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:41,884 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1028 transitions. [2022-03-03 19:37:41,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1028 transitions. [2022-03-03 19:37:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:41,884 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:41,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:41,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-03 19:37:42,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:42,085 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:42,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1231585484, now seen corresponding path program 76 times [2022-03-03 19:37:42,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:42,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473595003] [2022-03-03 19:37:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:42,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:42,443 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:42,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:42,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473595003] [2022-03-03 19:37:42,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473595003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:42,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395398593] [2022-03-03 19:37:42,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:42,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:42,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:42,444 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) [2022-03-03 19:37:42,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:37:42,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:42,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:42,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:42,841 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 27 treesize of output 13 [2022-03-03 19:37:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:42,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:43,371 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:43,371 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 42 treesize of output 60 [2022-03-03 19:37:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:43,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395398593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:43,428 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:43,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:43,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498377899] [2022-03-03 19:37:43,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:43,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:43,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:43,429 INFO L87 Difference]: Start difference. First operand 501 states and 1028 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:44,929 INFO L93 Difference]: Finished difference Result 885 states and 1753 transitions. [2022-03-03 19:37:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:37:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:44,930 INFO L225 Difference]: With dead ends: 885 [2022-03-03 19:37:44,930 INFO L226 Difference]: Without dead ends: 837 [2022-03-03 19:37:44,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 13 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=508, Invalid=5812, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:37:44,931 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 204 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 396 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:44,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 493 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1212 Invalid, 0 Unknown, 396 Unchecked, 0.4s Time] [2022-03-03 19:37:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2022-03-03 19:37:44,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 501. [2022-03-03 19:37:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.056) internal successors, (1028), 500 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1028 transitions. [2022-03-03 19:37:44,936 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1028 transitions. Word has length 33 [2022-03-03 19:37:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:44,936 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1028 transitions. [2022-03-03 19:37:44,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1028 transitions. [2022-03-03 19:37:44,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:44,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:44,937 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:44,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-03 19:37:45,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:45,138 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1032792910, now seen corresponding path program 77 times [2022-03-03 19:37:45,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:45,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132992667] [2022-03-03 19:37:45,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:45,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:45,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:45,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132992667] [2022-03-03 19:37:45,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132992667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:45,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212872117] [2022-03-03 19:37:45,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:45,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:45,396 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) [2022-03-03 19:37:45,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:37:45,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:37:45,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:45,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:45,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:45,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:45,812 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 25 treesize of output 13 [2022-03-03 19:37:45,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:45,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:46,486 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:46,486 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 49 treesize of output 63 [2022-03-03 19:37:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:46,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212872117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:46,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:46,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:37:46,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641712867] [2022-03-03 19:37:46,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:46,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:37:46,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:46,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:37:46,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1792, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:37:46,537 INFO L87 Difference]: Start difference. First operand 501 states and 1028 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:48,494 INFO L93 Difference]: Finished difference Result 868 states and 1755 transitions. [2022-03-03 19:37:48,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:37:48,494 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:48,495 INFO L225 Difference]: With dead ends: 868 [2022-03-03 19:37:48,495 INFO L226 Difference]: Without dead ends: 820 [2022-03-03 19:37:48,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 37 SyntacticMatches, 10 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2223 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=569, Invalid=6913, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:37:48,495 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 556 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:48,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 613 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2057 Invalid, 0 Unknown, 556 Unchecked, 0.7s Time] [2022-03-03 19:37:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-03-03 19:37:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 504. [2022-03-03 19:37:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.05765407554672) internal successors, (1035), 503 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1035 transitions. [2022-03-03 19:37:48,501 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1035 transitions. Word has length 33 [2022-03-03 19:37:48,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:48,501 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1035 transitions. [2022-03-03 19:37:48,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1035 transitions. [2022-03-03 19:37:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:48,502 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:48,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:48,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-03 19:37:48,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:48,707 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:48,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1876551796, now seen corresponding path program 78 times [2022-03-03 19:37:48,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:48,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359302725] [2022-03-03 19:37:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:48,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:48,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:48,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359302725] [2022-03-03 19:37:48,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359302725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:48,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792322111] [2022-03-03 19:37:48,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:48,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:48,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:48,994 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) [2022-03-03 19:37:48,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:37:49,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:37:49,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:49,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:49,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:49,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:49,384 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 27 treesize of output 13 [2022-03-03 19:37:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:49,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:49,954 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:49,954 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 42 treesize of output 60 [2022-03-03 19:37:50,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:50,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792322111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:50,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:50,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:50,003 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922930590] [2022-03-03 19:37:50,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:50,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:50,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:50,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:50,003 INFO L87 Difference]: Start difference. First operand 504 states and 1035 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:51,916 INFO L93 Difference]: Finished difference Result 932 states and 1853 transitions. [2022-03-03 19:37:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:37:51,916 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:51,917 INFO L225 Difference]: With dead ends: 932 [2022-03-03 19:37:51,917 INFO L226 Difference]: Without dead ends: 896 [2022-03-03 19:37:51,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 48 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2547 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=639, Invalid=7733, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:37:51,918 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 187 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 1285 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:51,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 680 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1285 Invalid, 0 Unknown, 429 Unchecked, 0.5s Time] [2022-03-03 19:37:51,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-03-03 19:37:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 563. [2022-03-03 19:37:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.0249110320284696) internal successors, (1138), 562 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1138 transitions. [2022-03-03 19:37:51,924 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1138 transitions. Word has length 33 [2022-03-03 19:37:51,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:51,924 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 1138 transitions. [2022-03-03 19:37:51,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:51,924 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1138 transitions. [2022-03-03 19:37:51,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:51,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:51,925 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:51,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-03 19:37:52,125 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,SelfDestructingSolverStorable83 [2022-03-03 19:37:52,125 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2145694682, now seen corresponding path program 79 times [2022-03-03 19:37:52,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:52,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907369940] [2022-03-03 19:37:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:52,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:52,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907369940] [2022-03-03 19:37:52,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907369940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:52,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405734361] [2022-03-03 19:37:52,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:52,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:52,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:52,387 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) [2022-03-03 19:37:52,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 19:37:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:52,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:52,766 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 27 treesize of output 13 [2022-03-03 19:37:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:52,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:53,325 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:53,325 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 42 treesize of output 60 [2022-03-03 19:37:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:53,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405734361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:53,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:53,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:53,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10812892] [2022-03-03 19:37:53,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:53,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:53,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:53,384 INFO L87 Difference]: Start difference. First operand 563 states and 1138 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:56,544 INFO L93 Difference]: Finished difference Result 1276 states and 2525 transitions. [2022-03-03 19:37:56,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 19:37:56,544 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:37:56,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:56,545 INFO L225 Difference]: With dead ends: 1276 [2022-03-03 19:37:56,545 INFO L226 Difference]: Without dead ends: 1127 [2022-03-03 19:37:56,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1133, Invalid=12207, Unknown=0, NotChecked=0, Total=13340 [2022-03-03 19:37:56,546 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 294 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 2261 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 2261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 730 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:56,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 778 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 2261 Invalid, 0 Unknown, 730 Unchecked, 0.8s Time] [2022-03-03 19:37:56,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-03 19:37:56,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 509. [2022-03-03 19:37:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.059055118110236) internal successors, (1046), 508 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1046 transitions. [2022-03-03 19:37:56,552 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1046 transitions. Word has length 33 [2022-03-03 19:37:56,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:56,553 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1046 transitions. [2022-03-03 19:37:56,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:56,553 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1046 transitions. [2022-03-03 19:37:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:37:56,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:56,553 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:56,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:56,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:56,767 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:37:56,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:56,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1777304910, now seen corresponding path program 80 times [2022-03-03 19:37:56,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:56,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012642691] [2022-03-03 19:37:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:57,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:57,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:57,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012642691] [2022-03-03 19:37:57,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012642691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:57,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771112094] [2022-03-03 19:37:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:57,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:57,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:57,071 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) [2022-03-03 19:37:57,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 19:37:57,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:57,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:57,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:57,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:57,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:57,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:57,393 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 27 treesize of output 13 [2022-03-03 19:37:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:57,990 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:37:57,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:37:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:58,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771112094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:58,042 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:58,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:37:58,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317833938] [2022-03-03 19:37:58,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:58,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:37:58,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:58,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:37:58,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:37:58,043 INFO L87 Difference]: Start difference. First operand 509 states and 1046 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:00,284 INFO L93 Difference]: Finished difference Result 1020 states and 2080 transitions. [2022-03-03 19:38:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:38:00,285 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:00,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:00,286 INFO L225 Difference]: With dead ends: 1020 [2022-03-03 19:38:00,286 INFO L226 Difference]: Without dead ends: 988 [2022-03-03 19:38:00,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2435 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=830, Invalid=7542, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:38:00,287 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 244 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:00,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 489 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1445 Invalid, 0 Unknown, 344 Unchecked, 0.5s Time] [2022-03-03 19:38:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-03-03 19:38:00,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 514. [2022-03-03 19:38:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 2.060428849902534) internal successors, (1057), 513 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1057 transitions. [2022-03-03 19:38:00,293 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1057 transitions. Word has length 33 [2022-03-03 19:38:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:00,293 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1057 transitions. [2022-03-03 19:38:00,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1057 transitions. [2022-03-03 19:38:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:00,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:00,294 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:00,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-03 19:38:00,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:00,494 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1091420020, now seen corresponding path program 81 times [2022-03-03 19:38:00,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:00,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958976648] [2022-03-03 19:38:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:00,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:00,751 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:00,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958976648] [2022-03-03 19:38:00,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958976648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:00,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676598011] [2022-03-03 19:38:00,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:00,753 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) [2022-03-03 19:38:00,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 19:38:00,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:38:00,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:00,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:01,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:01,065 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 27 treesize of output 13 [2022-03-03 19:38:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:01,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:01,659 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:01,660 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 42 treesize of output 60 [2022-03-03 19:38:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:01,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676598011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:01,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:01,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:01,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810215078] [2022-03-03 19:38:01,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:01,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:01,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1467, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:01,714 INFO L87 Difference]: Start difference. First operand 514 states and 1057 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:04,529 INFO L93 Difference]: Finished difference Result 945 states and 1913 transitions. [2022-03-03 19:38:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 19:38:04,529 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:04,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:04,530 INFO L225 Difference]: With dead ends: 945 [2022-03-03 19:38:04,530 INFO L226 Difference]: Without dead ends: 917 [2022-03-03 19:38:04,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2826 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1047, Invalid=8853, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 19:38:04,531 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 285 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:04,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 390 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1445 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-03-03 19:38:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-03-03 19:38:04,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 506. [2022-03-03 19:38:04,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.0554455445544555) internal successors, (1038), 505 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1038 transitions. [2022-03-03 19:38:04,537 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1038 transitions. Word has length 33 [2022-03-03 19:38:04,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:04,537 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1038 transitions. [2022-03-03 19:38:04,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:04,537 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1038 transitions. [2022-03-03 19:38:04,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:04,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:04,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:04,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-03 19:38:04,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:04,738 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:04,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:04,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1883626412, now seen corresponding path program 82 times [2022-03-03 19:38:04,739 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:04,739 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857549997] [2022-03-03 19:38:04,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:04,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:04,990 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:04,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:04,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857549997] [2022-03-03 19:38:04,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857549997] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:04,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793241166] [2022-03-03 19:38:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:04,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:04,992 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) [2022-03-03 19:38:04,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 19:38:05,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:05,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:05,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:05,401 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 27 treesize of output 13 [2022-03-03 19:38:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:05,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:05,941 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:05,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:38:05,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:05,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793241166] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:05,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:05,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:05,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433281570] [2022-03-03 19:38:05,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:05,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:05,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:05,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:05,992 INFO L87 Difference]: Start difference. First operand 506 states and 1038 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:07,933 INFO L93 Difference]: Finished difference Result 914 states and 1839 transitions. [2022-03-03 19:38:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-03 19:38:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:07,934 INFO L225 Difference]: With dead ends: 914 [2022-03-03 19:38:07,934 INFO L226 Difference]: Without dead ends: 883 [2022-03-03 19:38:07,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2187 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=608, Invalid=6702, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:38:07,935 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 210 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 1838 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 873 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:07,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 740 Invalid, 2775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1838 Invalid, 0 Unknown, 873 Unchecked, 0.7s Time] [2022-03-03 19:38:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-03 19:38:07,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 530. [2022-03-03 19:38:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 529 states have (on average 2.0396975425330814) internal successors, (1079), 529 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:07,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 1079 transitions. [2022-03-03 19:38:07,940 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 1079 transitions. Word has length 33 [2022-03-03 19:38:07,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:07,940 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 1079 transitions. [2022-03-03 19:38:07,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 1079 transitions. [2022-03-03 19:38:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:07,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:07,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:07,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:08,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:08,142 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:08,143 INFO L85 PathProgramCache]: Analyzing trace with hash 838097554, now seen corresponding path program 83 times [2022-03-03 19:38:08,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:08,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805664523] [2022-03-03 19:38:08,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:08,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:08,403 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:08,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805664523] [2022-03-03 19:38:08,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805664523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:08,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057853210] [2022-03-03 19:38:08,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:08,404 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) [2022-03-03 19:38:08,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 19:38:08,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:38:08,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:08,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:08,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:08,879 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 25 treesize of output 13 [2022-03-03 19:38:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:09,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:09,505 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:09,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2022-03-03 19:38:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:09,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057853210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:09,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:09,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:38:09,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496545290] [2022-03-03 19:38:09,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:09,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:38:09,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:38:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:38:09,560 INFO L87 Difference]: Start difference. First operand 530 states and 1079 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:11,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:11,599 INFO L93 Difference]: Finished difference Result 884 states and 1786 transitions. [2022-03-03 19:38:11,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:38:11,599 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:11,600 INFO L225 Difference]: With dead ends: 884 [2022-03-03 19:38:11,600 INFO L226 Difference]: Without dead ends: 855 [2022-03-03 19:38:11,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2297 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=625, Invalid=7031, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:38:11,601 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 402 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:11,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 482 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1701 Invalid, 0 Unknown, 402 Unchecked, 0.6s Time] [2022-03-03 19:38:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-03-03 19:38:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 525. [2022-03-03 19:38:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 2.0400763358778624) internal successors, (1069), 524 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1069 transitions. [2022-03-03 19:38:11,606 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1069 transitions. Word has length 33 [2022-03-03 19:38:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:11,606 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1069 transitions. [2022-03-03 19:38:11,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1069 transitions. [2022-03-03 19:38:11,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:11,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:11,607 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:11,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-03 19:38:11,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:11,807 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:11,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1321500814, now seen corresponding path program 84 times [2022-03-03 19:38:11,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:11,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84017700] [2022-03-03 19:38:11,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:11,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:11,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:12,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:12,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84017700] [2022-03-03 19:38:12,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84017700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:12,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219275013] [2022-03-03 19:38:12,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:38:12,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:12,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:12,064 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) [2022-03-03 19:38:12,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 19:38:12,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:38:12,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:12,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:38:12,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:12,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:12,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:12,447 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 13 [2022-03-03 19:38:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:12,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:13,052 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:13,052 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 42 treesize of output 60 [2022-03-03 19:38:13,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:13,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219275013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:13,105 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:13,105 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:13,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613374990] [2022-03-03 19:38:13,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:13,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:13,105 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:13,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:13,105 INFO L87 Difference]: Start difference. First operand 525 states and 1069 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:14,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:14,851 INFO L93 Difference]: Finished difference Result 888 states and 1792 transitions. [2022-03-03 19:38:14,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:38:14,851 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:14,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:14,852 INFO L225 Difference]: With dead ends: 888 [2022-03-03 19:38:14,852 INFO L226 Difference]: Without dead ends: 859 [2022-03-03 19:38:14,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2032 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=589, Invalid=6383, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:38:14,853 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 216 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:14,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 450 Invalid, 2150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1451 Invalid, 0 Unknown, 639 Unchecked, 0.5s Time] [2022-03-03 19:38:14,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2022-03-03 19:38:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 503. [2022-03-03 19:38:14,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.051792828685259) internal successors, (1030), 502 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:14,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1030 transitions. [2022-03-03 19:38:14,858 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1030 transitions. Word has length 33 [2022-03-03 19:38:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:14,858 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1030 transitions. [2022-03-03 19:38:14,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1030 transitions. [2022-03-03 19:38:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:14,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:14,859 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:14,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-03 19:38:15,059 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,SelfDestructingSolverStorable89 [2022-03-03 19:38:15,059 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1309709944, now seen corresponding path program 85 times [2022-03-03 19:38:15,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:15,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117205222] [2022-03-03 19:38:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:15,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:15,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:15,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117205222] [2022-03-03 19:38:15,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117205222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:15,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449192812] [2022-03-03 19:38:15,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:38:15,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:15,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:15,316 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) [2022-03-03 19:38:15,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 19:38:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:15,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:15,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:15,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:15,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:15,720 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 27 treesize of output 13 [2022-03-03 19:38:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:15,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:16,258 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:16,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:38:16,316 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:16,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449192812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:16,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:16,317 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:16,317 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693379335] [2022-03-03 19:38:16,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:16,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:16,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:16,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:16,317 INFO L87 Difference]: Start difference. First operand 503 states and 1030 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:17,739 INFO L93 Difference]: Finished difference Result 895 states and 1804 transitions. [2022-03-03 19:38:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:38:17,740 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:17,741 INFO L225 Difference]: With dead ends: 895 [2022-03-03 19:38:17,741 INFO L226 Difference]: Without dead ends: 838 [2022-03-03 19:38:17,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=515, Invalid=5647, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:38:17,741 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 659 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:17,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 492 Invalid, 1872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1159 Invalid, 0 Unknown, 659 Unchecked, 0.4s Time] [2022-03-03 19:38:17,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-03-03 19:38:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 503. [2022-03-03 19:38:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.049800796812749) internal successors, (1029), 502 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:17,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1029 transitions. [2022-03-03 19:38:17,747 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1029 transitions. Word has length 33 [2022-03-03 19:38:17,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:17,747 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1029 transitions. [2022-03-03 19:38:17,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:17,747 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1029 transitions. [2022-03-03 19:38:17,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:17,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:17,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:17,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:17,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:17,963 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:17,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2054221944, now seen corresponding path program 86 times [2022-03-03 19:38:17,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:17,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739482070] [2022-03-03 19:38:17,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:17,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:18,334 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:18,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739482070] [2022-03-03 19:38:18,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739482070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:18,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895625625] [2022-03-03 19:38:18,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:38:18,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:18,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:18,335 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) [2022-03-03 19:38:18,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 19:38:18,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:38:18,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:18,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:18,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:18,655 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 27 treesize of output 13 [2022-03-03 19:38:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:18,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:19,243 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:19,244 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 42 treesize of output 60 [2022-03-03 19:38:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:19,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895625625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:19,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:19,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:19,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763106604] [2022-03-03 19:38:19,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:19,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:19,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:19,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:19,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:19,302 INFO L87 Difference]: Start difference. First operand 503 states and 1029 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:21,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:21,380 INFO L93 Difference]: Finished difference Result 936 states and 1879 transitions. [2022-03-03 19:38:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:38:21,380 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:21,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:21,381 INFO L225 Difference]: With dead ends: 936 [2022-03-03 19:38:21,381 INFO L226 Difference]: Without dead ends: 904 [2022-03-03 19:38:21,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2252 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=786, Invalid=7224, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:38:21,382 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 234 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:21,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 458 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1520 Invalid, 0 Unknown, 388 Unchecked, 0.6s Time] [2022-03-03 19:38:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-03-03 19:38:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 504. [2022-03-03 19:38:21,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.0497017892644136) internal successors, (1031), 503 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:21,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1031 transitions. [2022-03-03 19:38:21,388 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1031 transitions. Word has length 33 [2022-03-03 19:38:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:21,388 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1031 transitions. [2022-03-03 19:38:21,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1031 transitions. [2022-03-03 19:38:21,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:21,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:21,389 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:21,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-03 19:38:21,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:21,589 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -814502986, now seen corresponding path program 87 times [2022-03-03 19:38:21,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:21,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567691272] [2022-03-03 19:38:21,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:21,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:21,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:21,837 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:21,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567691272] [2022-03-03 19:38:21,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567691272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:21,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362777407] [2022-03-03 19:38:21,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:21,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:21,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:21,838 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) [2022-03-03 19:38:21,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 19:38:21,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:38:21,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:22,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:22,165 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 27 treesize of output 13 [2022-03-03 19:38:22,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:22,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:22,739 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:22,739 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 42 treesize of output 60 [2022-03-03 19:38:22,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:22,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362777407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:22,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:22,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:22,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006509558] [2022-03-03 19:38:22,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:22,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:22,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:22,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:22,792 INFO L87 Difference]: Start difference. First operand 504 states and 1031 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:25,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:25,482 INFO L93 Difference]: Finished difference Result 1183 states and 2371 transitions. [2022-03-03 19:38:25,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:38:25,482 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:25,483 INFO L225 Difference]: With dead ends: 1183 [2022-03-03 19:38:25,483 INFO L226 Difference]: Without dead ends: 1155 [2022-03-03 19:38:25,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1076, Invalid=9024, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 19:38:25,484 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 284 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 351 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 461 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1508 Invalid, 0 Unknown, 351 Unchecked, 0.6s Time] [2022-03-03 19:38:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-03-03 19:38:25,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 499. [2022-03-03 19:38:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.0502008032128516) internal successors, (1021), 498 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1021 transitions. [2022-03-03 19:38:25,490 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1021 transitions. Word has length 33 [2022-03-03 19:38:25,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:25,490 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1021 transitions. [2022-03-03 19:38:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1021 transitions. [2022-03-03 19:38:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:25,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:25,491 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:25,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:25,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:25,692 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:25,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1885546406, now seen corresponding path program 88 times [2022-03-03 19:38:25,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:25,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899447859] [2022-03-03 19:38:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:25,946 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:25,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899447859] [2022-03-03 19:38:25,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899447859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:25,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820656471] [2022-03-03 19:38:25,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:25,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:25,947 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) [2022-03-03 19:38:25,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 19:38:25,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:25,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:26,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:26,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:26,346 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-03-03 19:38:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:26,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:26,910 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:26,910 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 42 treesize of output 60 [2022-03-03 19:38:26,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:26,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820656471] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:26,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:26,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:26,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214450876] [2022-03-03 19:38:26,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:26,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:26,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:26,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:26,965 INFO L87 Difference]: Start difference. First operand 499 states and 1021 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:28,607 INFO L93 Difference]: Finished difference Result 925 states and 1853 transitions. [2022-03-03 19:38:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:38:28,607 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:28,608 INFO L225 Difference]: With dead ends: 925 [2022-03-03 19:38:28,608 INFO L226 Difference]: Without dead ends: 841 [2022-03-03 19:38:28,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=558, Invalid=6248, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:38:28,609 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 212 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 403 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:28,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 440 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1383 Invalid, 0 Unknown, 403 Unchecked, 0.5s Time] [2022-03-03 19:38:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-03 19:38:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 505. [2022-03-03 19:38:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 2.0496031746031744) internal successors, (1033), 504 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:28,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1033 transitions. [2022-03-03 19:38:28,614 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1033 transitions. Word has length 33 [2022-03-03 19:38:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:28,614 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1033 transitions. [2022-03-03 19:38:28,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1033 transitions. [2022-03-03 19:38:28,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:28,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:28,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:28,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-03 19:38:28,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:28,815 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:28,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:28,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1244435816, now seen corresponding path program 89 times [2022-03-03 19:38:28,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:28,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577143014] [2022-03-03 19:38:28,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:28,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:29,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:29,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577143014] [2022-03-03 19:38:29,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577143014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:29,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578603331] [2022-03-03 19:38:29,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:29,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:29,102 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) [2022-03-03 19:38:29,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 19:38:29,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:38:29,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:29,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:38:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:29,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 27 treesize of output 13 [2022-03-03 19:38:29,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:29,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:30,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:30,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:30,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:30,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:30,137 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 42 treesize of output 54 [2022-03-03 19:38:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:30,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578603331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:30,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:30,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 45 [2022-03-03 19:38:30,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547283311] [2022-03-03 19:38:30,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:38:30,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:38:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1827, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:38:30,225 INFO L87 Difference]: Start difference. First operand 505 states and 1033 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:36,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:36,091 INFO L93 Difference]: Finished difference Result 1648 states and 3268 transitions. [2022-03-03 19:38:36,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-03-03 19:38:36,091 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:36,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:36,093 INFO L225 Difference]: With dead ends: 1648 [2022-03-03 19:38:36,093 INFO L226 Difference]: Without dead ends: 1484 [2022-03-03 19:38:36,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9447 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3160, Invalid=25910, Unknown=0, NotChecked=0, Total=29070 [2022-03-03 19:38:36,094 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 489 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3107 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 4005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 3107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:36,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 797 Invalid, 4005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 3107 Invalid, 0 Unknown, 611 Unchecked, 1.2s Time] [2022-03-03 19:38:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1484 states. [2022-03-03 19:38:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1484 to 539. [2022-03-03 19:38:36,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.0483271375464684) internal successors, (1102), 538 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1102 transitions. [2022-03-03 19:38:36,101 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1102 transitions. Word has length 33 [2022-03-03 19:38:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:36,101 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1102 transitions. [2022-03-03 19:38:36,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1102 transitions. [2022-03-03 19:38:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:36,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:36,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:36,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:36,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:36,303 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:36,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1624289114, now seen corresponding path program 90 times [2022-03-03 19:38:36,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:36,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315031248] [2022-03-03 19:38:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:36,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:36,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315031248] [2022-03-03 19:38:36,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315031248] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:36,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280943482] [2022-03-03 19:38:36,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:38:36,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:36,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:36,555 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) [2022-03-03 19:38:36,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 19:38:36,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:38:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:38:36,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:36,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:36,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:36,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:36,893 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 25 treesize of output 13 [2022-03-03 19:38:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:37,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:37,480 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:37,480 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 42 treesize of output 60 [2022-03-03 19:38:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:37,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280943482] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:37,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:37,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:37,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834711538] [2022-03-03 19:38:37,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:37,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:37,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:37,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:37,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:37,534 INFO L87 Difference]: Start difference. First operand 539 states and 1102 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:40,077 INFO L93 Difference]: Finished difference Result 1125 states and 2260 transitions. [2022-03-03 19:38:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 19:38:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:40,079 INFO L225 Difference]: With dead ends: 1125 [2022-03-03 19:38:40,079 INFO L226 Difference]: Without dead ends: 1097 [2022-03-03 19:38:40,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 37 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3075 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1045, Invalid=9461, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:38:40,080 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 251 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 1800 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:40,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 481 Invalid, 2106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1800 Invalid, 0 Unknown, 170 Unchecked, 0.7s Time] [2022-03-03 19:38:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-03-03 19:38:40,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 539. [2022-03-03 19:38:40,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.0483271375464684) internal successors, (1102), 538 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:40,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1102 transitions. [2022-03-03 19:38:40,086 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1102 transitions. Word has length 33 [2022-03-03 19:38:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:40,086 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1102 transitions. [2022-03-03 19:38:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:40,087 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1102 transitions. [2022-03-03 19:38:40,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:40,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:40,087 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:40,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:40,287 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,SelfDestructingSolverStorable95 [2022-03-03 19:38:40,288 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:40,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:40,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1677127142, now seen corresponding path program 91 times [2022-03-03 19:38:40,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:40,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382577689] [2022-03-03 19:38:40,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:40,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:40,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:40,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382577689] [2022-03-03 19:38:40,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382577689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:40,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105715801] [2022-03-03 19:38:40,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:38:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:40,544 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) [2022-03-03 19:38:40,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 19:38:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:40,894 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 27 treesize of output 13 [2022-03-03 19:38:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:41,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:41,474 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:41,474 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 42 treesize of output 60 [2022-03-03 19:38:41,520 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:41,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105715801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:41,520 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:41,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:41,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569790806] [2022-03-03 19:38:41,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:41,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:41,521 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:41,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1462, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:41,521 INFO L87 Difference]: Start difference. First operand 539 states and 1102 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:43,390 INFO L93 Difference]: Finished difference Result 1087 states and 2194 transitions. [2022-03-03 19:38:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 19:38:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:43,392 INFO L225 Difference]: With dead ends: 1087 [2022-03-03 19:38:43,392 INFO L226 Difference]: Without dead ends: 1055 [2022-03-03 19:38:43,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=678, Invalid=6632, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:38:43,393 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 177 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:43,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 494 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1846 Invalid, 0 Unknown, 197 Unchecked, 0.7s Time] [2022-03-03 19:38:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-03-03 19:38:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 535. [2022-03-03 19:38:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.048689138576779) internal successors, (1094), 534 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:43,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1094 transitions. [2022-03-03 19:38:43,399 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1094 transitions. Word has length 33 [2022-03-03 19:38:43,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:43,399 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1094 transitions. [2022-03-03 19:38:43,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:43,399 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1094 transitions. [2022-03-03 19:38:43,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:43,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:43,400 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:43,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:43,600 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,SelfDestructingSolverStorable96 [2022-03-03 19:38:43,601 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:43,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash -250884776, now seen corresponding path program 92 times [2022-03-03 19:38:43,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:43,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967992756] [2022-03-03 19:38:43,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:43,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:43,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:43,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967992756] [2022-03-03 19:38:43,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967992756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:43,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738219839] [2022-03-03 19:38:43,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:38:43,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:43,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:43,854 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) [2022-03-03 19:38:43,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 19:38:43,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:38:43,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:43,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:44,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:44,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:44,174 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 27 treesize of output 13 [2022-03-03 19:38:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:44,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:44,751 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:44,752 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 42 treesize of output 60 [2022-03-03 19:38:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:44,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738219839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:44,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:44,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:44,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015663279] [2022-03-03 19:38:44,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:44,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:44,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:44,805 INFO L87 Difference]: Start difference. First operand 535 states and 1094 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:47,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:47,477 INFO L93 Difference]: Finished difference Result 1177 states and 2374 transitions. [2022-03-03 19:38:47,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-03 19:38:47,477 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:47,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:47,478 INFO L225 Difference]: With dead ends: 1177 [2022-03-03 19:38:47,478 INFO L226 Difference]: Without dead ends: 1149 [2022-03-03 19:38:47,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3368 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1108, Invalid=10234, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:38:47,481 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 251 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 318 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:47,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 510 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1845 Invalid, 0 Unknown, 318 Unchecked, 0.7s Time] [2022-03-03 19:38:47,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2022-03-03 19:38:47,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 537. [2022-03-03 19:38:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 2.048507462686567) internal successors, (1098), 536 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1098 transitions. [2022-03-03 19:38:47,487 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1098 transitions. Word has length 33 [2022-03-03 19:38:47,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:47,487 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1098 transitions. [2022-03-03 19:38:47,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:47,487 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1098 transitions. [2022-03-03 19:38:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:47,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:47,488 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:47,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:47,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:47,689 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:47,689 INFO L85 PathProgramCache]: Analyzing trace with hash 104407902, now seen corresponding path program 93 times [2022-03-03 19:38:47,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:47,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192125916] [2022-03-03 19:38:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:47,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:47,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:47,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192125916] [2022-03-03 19:38:47,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192125916] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:47,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294751120] [2022-03-03 19:38:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:47,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:47,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:47,951 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) [2022-03-03 19:38:47,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 19:38:47,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:38:47,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:47,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:48,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:48,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:48,251 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 27 treesize of output 13 [2022-03-03 19:38:48,455 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:48,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:48,858 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:48,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:38:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:48,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294751120] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:48,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:48,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:48,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595798928] [2022-03-03 19:38:48,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:48,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:48,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:48,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:48,918 INFO L87 Difference]: Start difference. First operand 537 states and 1098 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:50,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:50,475 INFO L93 Difference]: Finished difference Result 1024 states and 2066 transitions. [2022-03-03 19:38:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:38:50,476 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:50,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:50,477 INFO L225 Difference]: With dead ends: 1024 [2022-03-03 19:38:50,477 INFO L226 Difference]: Without dead ends: 992 [2022-03-03 19:38:50,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=5755, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:38:50,477 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:50,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 450 Invalid, 1954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1737 Invalid, 0 Unknown, 155 Unchecked, 0.6s Time] [2022-03-03 19:38:50,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-03-03 19:38:50,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 538. [2022-03-03 19:38:50,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.0484171322160147) internal successors, (1100), 537 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1100 transitions. [2022-03-03 19:38:50,483 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1100 transitions. Word has length 33 [2022-03-03 19:38:50,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:50,483 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1100 transitions. [2022-03-03 19:38:50,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:50,484 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1100 transitions. [2022-03-03 19:38:50,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:50,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:50,484 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:50,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 19:38:50,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:50,692 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:50,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1530650268, now seen corresponding path program 94 times [2022-03-03 19:38:50,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:50,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023033727] [2022-03-03 19:38:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:50,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:50,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:50,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023033727] [2022-03-03 19:38:50,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023033727] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:50,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797152280] [2022-03-03 19:38:50,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:50,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:50,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:50,946 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) [2022-03-03 19:38:50,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 19:38:50,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:50,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:50,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:50,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:51,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:51,237 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 27 treesize of output 13 [2022-03-03 19:38:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:51,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:51,842 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:38:51,842 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 42 treesize of output 60 [2022-03-03 19:38:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:51,890 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797152280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:51,890 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:51,890 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:38:51,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143651095] [2022-03-03 19:38:51,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:51,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:38:51,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:38:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:38:51,891 INFO L87 Difference]: Start difference. First operand 538 states and 1100 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:53,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:53,988 INFO L93 Difference]: Finished difference Result 1023 states and 2068 transitions. [2022-03-03 19:38:53,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 19:38:53,988 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:38:53,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:53,989 INFO L225 Difference]: With dead ends: 1023 [2022-03-03 19:38:53,990 INFO L226 Difference]: Without dead ends: 995 [2022-03-03 19:38:53,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=792, Invalid=7398, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:38:53,990 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 208 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:53,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 494 Invalid, 2314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 2093 Invalid, 0 Unknown, 139 Unchecked, 0.7s Time] [2022-03-03 19:38:53,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-03 19:38:53,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 538. [2022-03-03 19:38:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.0484171322160147) internal successors, (1100), 537 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1100 transitions. [2022-03-03 19:38:53,996 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1100 transitions. Word has length 33 [2022-03-03 19:38:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1100 transitions. [2022-03-03 19:38:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1100 transitions. [2022-03-03 19:38:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:38:53,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:53,997 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:38:54,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:54,212 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,SelfDestructingSolverStorable99 [2022-03-03 19:38:54,212 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:38:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:54,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1729135732, now seen corresponding path program 95 times [2022-03-03 19:38:54,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:54,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231571658] [2022-03-03 19:38:54,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:54,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:54,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:54,473 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:54,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231571658] [2022-03-03 19:38:54,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231571658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:54,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551574464] [2022-03-03 19:38:54,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:54,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:54,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:54,475 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) [2022-03-03 19:38:54,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 19:38:54,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:38:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:54,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:38:54,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:54,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:54,794 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 27 treesize of output 13 [2022-03-03 19:38:55,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:55,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:55,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:55,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:55,632 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:38:55,632 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 47 treesize of output 55 [2022-03-03 19:38:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:55,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551574464] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:55,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:55,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:38:55,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953407829] [2022-03-03 19:38:55,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:55,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:38:55,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:38:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2093, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:38:55,733 INFO L87 Difference]: Start difference. First operand 538 states and 1100 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:00,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:00,358 INFO L93 Difference]: Finished difference Result 1283 states and 2509 transitions. [2022-03-03 19:39:00,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-03-03 19:39:00,358 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:00,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:00,359 INFO L225 Difference]: With dead ends: 1283 [2022-03-03 19:39:00,359 INFO L226 Difference]: Without dead ends: 1171 [2022-03-03 19:39:00,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5613 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1985, Invalid=17197, Unknown=0, NotChecked=0, Total=19182 [2022-03-03 19:39:00,360 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 359 mSDsluCounter, 1726 mSDsCounter, 0 mSdLazyCounter, 3629 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 4274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 475 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:00,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 987 Invalid, 4274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3629 Invalid, 0 Unknown, 475 Unchecked, 1.3s Time] [2022-03-03 19:39:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-03-03 19:39:00,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 542. [2022-03-03 19:39:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.048059149722736) internal successors, (1108), 541 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1108 transitions. [2022-03-03 19:39:00,367 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1108 transitions. Word has length 33 [2022-03-03 19:39:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:00,367 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1108 transitions. [2022-03-03 19:39:00,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1108 transitions. [2022-03-03 19:39:00,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:00,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:00,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:00,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:00,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:00,568 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:00,569 INFO L85 PathProgramCache]: Analyzing trace with hash 747488074, now seen corresponding path program 96 times [2022-03-03 19:39:00,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:00,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724586205] [2022-03-03 19:39:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:00,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:00,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:00,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724586205] [2022-03-03 19:39:00,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724586205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:00,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382566493] [2022-03-03 19:39:00,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:39:00,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:00,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:00,824 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) [2022-03-03 19:39:00,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 19:39:00,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:39:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:39:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:01,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:01,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:01,229 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 25 treesize of output 13 [2022-03-03 19:39:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:01,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:01,756 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:01,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:39:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:01,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382566493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:01,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:01,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:01,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321560544] [2022-03-03 19:39:01,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:01,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:01,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:01,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:01,807 INFO L87 Difference]: Start difference. First operand 542 states and 1108 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:03,411 INFO L93 Difference]: Finished difference Result 810 states and 1637 transitions. [2022-03-03 19:39:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:39:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:03,412 INFO L225 Difference]: With dead ends: 810 [2022-03-03 19:39:03,412 INFO L226 Difference]: Without dead ends: 774 [2022-03-03 19:39:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=547, Invalid=5773, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:39:03,413 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 174 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:03,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 450 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1441 Invalid, 0 Unknown, 154 Unchecked, 0.5s Time] [2022-03-03 19:39:03,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-03-03 19:39:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 552. [2022-03-03 19:39:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 2.043557168784029) internal successors, (1126), 551 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 1126 transitions. [2022-03-03 19:39:03,418 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 1126 transitions. Word has length 33 [2022-03-03 19:39:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:03,418 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 1126 transitions. [2022-03-03 19:39:03,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 1126 transitions. [2022-03-03 19:39:03,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:03,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:03,419 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:03,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-03 19:39:03,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:03,620 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:03,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:03,620 INFO L85 PathProgramCache]: Analyzing trace with hash -28897898, now seen corresponding path program 97 times [2022-03-03 19:39:03,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:03,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735429388] [2022-03-03 19:39:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:03,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:03,886 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:03,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735429388] [2022-03-03 19:39:03,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735429388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:03,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319233001] [2022-03-03 19:39:03,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:39:03,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:03,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:03,892 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) [2022-03-03 19:39:03,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 19:39:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:03,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:04,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:04,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:04,281 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 27 treesize of output 13 [2022-03-03 19:39:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:04,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:04,810 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:04,810 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 42 treesize of output 60 [2022-03-03 19:39:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:04,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319233001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:04,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:04,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:04,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186570310] [2022-03-03 19:39:04,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:04,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:04,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:04,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:04,870 INFO L87 Difference]: Start difference. First operand 552 states and 1126 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:05,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:05,815 INFO L93 Difference]: Finished difference Result 685 states and 1377 transitions. [2022-03-03 19:39:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:39:05,816 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:05,816 INFO L225 Difference]: With dead ends: 685 [2022-03-03 19:39:05,816 INFO L226 Difference]: Without dead ends: 636 [2022-03-03 19:39:05,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=3411, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:39:05,817 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:05,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 492 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1057 Invalid, 0 Unknown, 240 Unchecked, 0.4s Time] [2022-03-03 19:39:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-03 19:39:05,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 543. [2022-03-03 19:39:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.047970479704797) internal successors, (1110), 542 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1110 transitions. [2022-03-03 19:39:05,822 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1110 transitions. Word has length 33 [2022-03-03 19:39:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:05,822 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1110 transitions. [2022-03-03 19:39:05,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1110 transitions. [2022-03-03 19:39:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:05,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:05,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:05,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-03 19:39:06,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-03 19:39:06,023 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:06,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2133110664, now seen corresponding path program 98 times [2022-03-03 19:39:06,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:06,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008485428] [2022-03-03 19:39:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:06,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:06,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:06,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008485428] [2022-03-03 19:39:06,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008485428] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:06,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982776035] [2022-03-03 19:39:06,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:39:06,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:06,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:06,277 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) [2022-03-03 19:39:06,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 19:39:06,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:39:06,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:06,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:06,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:06,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:06,669 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 27 treesize of output 13 [2022-03-03 19:39:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:06,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:07,208 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:07,208 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 42 treesize of output 60 [2022-03-03 19:39:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:07,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982776035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:07,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:07,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:07,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233630097] [2022-03-03 19:39:07,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:07,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:07,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:07,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:07,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:07,268 INFO L87 Difference]: Start difference. First operand 543 states and 1110 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:09,989 INFO L93 Difference]: Finished difference Result 1127 states and 2255 transitions. [2022-03-03 19:39:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-03 19:39:09,990 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:09,991 INFO L225 Difference]: With dead ends: 1127 [2022-03-03 19:39:09,991 INFO L226 Difference]: Without dead ends: 1031 [2022-03-03 19:39:09,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=930, Invalid=9782, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:39:09,991 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:09,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 601 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2361 Invalid, 0 Unknown, 121 Unchecked, 0.9s Time] [2022-03-03 19:39:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-03-03 19:39:09,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 551. [2022-03-03 19:39:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 2.0490909090909093) internal successors, (1127), 550 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 1127 transitions. [2022-03-03 19:39:09,997 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 1127 transitions. Word has length 33 [2022-03-03 19:39:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:09,997 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 1127 transitions. [2022-03-03 19:39:09,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 1127 transitions. [2022-03-03 19:39:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:09,998 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:09,998 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:10,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:10,198 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,SelfDestructingSolverStorable103 [2022-03-03 19:39:10,199 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:10,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1492000074, now seen corresponding path program 99 times [2022-03-03 19:39:10,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:10,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338776582] [2022-03-03 19:39:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:10,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:10,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:10,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338776582] [2022-03-03 19:39:10,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338776582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:10,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796376948] [2022-03-03 19:39:10,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:39:10,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:10,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:10,448 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) [2022-03-03 19:39:10,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 19:39:10,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:39:10,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:10,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:10,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:10,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:10,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:10,765 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 27 treesize of output 13 [2022-03-03 19:39:10,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:10,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:11,351 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:11,352 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 42 treesize of output 60 [2022-03-03 19:39:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:11,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796376948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:11,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:11,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:11,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565660669] [2022-03-03 19:39:11,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:11,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:11,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:11,398 INFO L87 Difference]: Start difference. First operand 551 states and 1127 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:13,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:13,638 INFO L93 Difference]: Finished difference Result 911 states and 1830 transitions. [2022-03-03 19:39:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:39:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:13,640 INFO L225 Difference]: With dead ends: 911 [2022-03-03 19:39:13,640 INFO L226 Difference]: Without dead ends: 879 [2022-03-03 19:39:13,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2215 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=755, Invalid=6901, Unknown=0, NotChecked=0, Total=7656 [2022-03-03 19:39:13,640 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 197 mSDsluCounter, 980 mSDsCounter, 0 mSdLazyCounter, 1951 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:13,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 605 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1951 Invalid, 0 Unknown, 272 Unchecked, 0.7s Time] [2022-03-03 19:39:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-03-03 19:39:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 554. [2022-03-03 19:39:13,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.0488245931283906) internal successors, (1133), 553 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1133 transitions. [2022-03-03 19:39:13,646 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1133 transitions. Word has length 33 [2022-03-03 19:39:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:13,646 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1133 transitions. [2022-03-03 19:39:13,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1133 transitions. [2022-03-03 19:39:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:13,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:13,647 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:13,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:13,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:13,847 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1376724856, now seen corresponding path program 100 times [2022-03-03 19:39:13,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:13,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204401825] [2022-03-03 19:39:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:14,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:14,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204401825] [2022-03-03 19:39:14,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204401825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:14,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245728540] [2022-03-03 19:39:14,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:39:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:14,102 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) [2022-03-03 19:39:14,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 19:39:14,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:39:14,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:14,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:14,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:14,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:14,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:14,446 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 27 treesize of output 13 [2022-03-03 19:39:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:14,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:15,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:15,033 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 42 treesize of output 60 [2022-03-03 19:39:15,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:15,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245728540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:15,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:15,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:15,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905760379] [2022-03-03 19:39:15,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:15,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:15,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:15,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:15,095 INFO L87 Difference]: Start difference. First operand 554 states and 1133 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:18,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:18,162 INFO L93 Difference]: Finished difference Result 1082 states and 2167 transitions. [2022-03-03 19:39:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-03 19:39:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:18,163 INFO L225 Difference]: With dead ends: 1082 [2022-03-03 19:39:18,163 INFO L226 Difference]: Without dead ends: 1026 [2022-03-03 19:39:18,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3756 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1258, Invalid=10514, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 19:39:18,164 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 338 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:18,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 416 Invalid, 2366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1626 Invalid, 0 Unknown, 554 Unchecked, 0.6s Time] [2022-03-03 19:39:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-03-03 19:39:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 549. [2022-03-03 19:39:18,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0492700729927007) internal successors, (1123), 548 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1123 transitions. [2022-03-03 19:39:18,170 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1123 transitions. Word has length 33 [2022-03-03 19:39:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:18,170 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1123 transitions. [2022-03-03 19:39:18,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1123 transitions. [2022-03-03 19:39:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:18,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:18,171 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:18,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:18,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:18,372 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:18,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:18,372 INFO L85 PathProgramCache]: Analyzing trace with hash -93323014, now seen corresponding path program 101 times [2022-03-03 19:39:18,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:18,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739056590] [2022-03-03 19:39:18,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:18,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:18,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:18,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739056590] [2022-03-03 19:39:18,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739056590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:18,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959334906] [2022-03-03 19:39:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:39:18,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:18,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:18,634 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) [2022-03-03 19:39:18,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 19:39:18,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:39:18,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:18,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:19,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:19,124 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 25 treesize of output 13 [2022-03-03 19:39:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:19,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:19,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:19,788 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:39:19,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 55 [2022-03-03 19:39:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:19,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959334906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:19,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:19,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:39:19,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959816943] [2022-03-03 19:39:19,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:19,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:39:19,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:39:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:39:19,905 INFO L87 Difference]: Start difference. First operand 549 states and 1123 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:22,372 INFO L93 Difference]: Finished difference Result 971 states and 1955 transitions. [2022-03-03 19:39:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:39:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:22,373 INFO L225 Difference]: With dead ends: 971 [2022-03-03 19:39:22,373 INFO L226 Difference]: Without dead ends: 931 [2022-03-03 19:39:22,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3164 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1012, Invalid=9088, Unknown=0, NotChecked=0, Total=10100 [2022-03-03 19:39:22,374 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 248 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 2100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:22,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 414 Invalid, 2100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1659 Invalid, 0 Unknown, 340 Unchecked, 0.7s Time] [2022-03-03 19:39:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-03-03 19:39:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 549. [2022-03-03 19:39:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.0474452554744524) internal successors, (1122), 548 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:22,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1122 transitions. [2022-03-03 19:39:22,380 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1122 transitions. Word has length 33 [2022-03-03 19:39:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:22,380 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1122 transitions. [2022-03-03 19:39:22,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 48 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:22,380 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1122 transitions. [2022-03-03 19:39:22,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:22,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:22,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:22,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-03 19:39:22,583 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,SelfDestructingSolverStorable106 [2022-03-03 19:39:22,584 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1860860232, now seen corresponding path program 102 times [2022-03-03 19:39:22,584 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:22,584 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139638312] [2022-03-03 19:39:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:22,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:22,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:22,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:22,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139638312] [2022-03-03 19:39:22,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139638312] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:22,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929888772] [2022-03-03 19:39:22,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:39:22,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:22,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:22,851 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) [2022-03-03 19:39:22,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 19:39:22,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:39:22,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:39:22,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:23,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:23,259 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 27 treesize of output 13 [2022-03-03 19:39:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:23,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:23,826 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:23,826 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 42 treesize of output 60 [2022-03-03 19:39:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:23,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929888772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:23,886 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:23,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:23,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777675872] [2022-03-03 19:39:23,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:23,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:23,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:23,887 INFO L87 Difference]: Start difference. First operand 549 states and 1122 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:25,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:25,559 INFO L93 Difference]: Finished difference Result 904 states and 1824 transitions. [2022-03-03 19:39:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:39:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:25,560 INFO L225 Difference]: With dead ends: 904 [2022-03-03 19:39:25,560 INFO L226 Difference]: Without dead ends: 868 [2022-03-03 19:39:25,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=574, Invalid=5906, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:39:25,561 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 176 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1542 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 347 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:25,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 443 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1542 Invalid, 0 Unknown, 347 Unchecked, 0.6s Time] [2022-03-03 19:39:25,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-03-03 19:39:25,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 549. [2022-03-03 19:39:25,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.045620437956204) internal successors, (1121), 548 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1121 transitions. [2022-03-03 19:39:25,566 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1121 transitions. Word has length 33 [2022-03-03 19:39:25,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:25,566 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1121 transitions. [2022-03-03 19:39:25,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1121 transitions. [2022-03-03 19:39:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:25,567 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:25,567 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:25,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:25,767 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,SelfDestructingSolverStorable107 [2022-03-03 19:39:25,767 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:25,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2108456312, now seen corresponding path program 103 times [2022-03-03 19:39:25,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:25,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462509771] [2022-03-03 19:39:25,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:25,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:26,045 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:26,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462509771] [2022-03-03 19:39:26,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462509771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:26,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861651600] [2022-03-03 19:39:26,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:39:26,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:26,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:26,047 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) [2022-03-03 19:39:26,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 19:39:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:26,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:26,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:26,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:26,366 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 27 treesize of output 13 [2022-03-03 19:39:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:26,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:26,952 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:26,952 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 42 treesize of output 60 [2022-03-03 19:39:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:27,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861651600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:27,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:27,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:27,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274688007] [2022-03-03 19:39:27,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:27,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:27,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:27,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:27,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1452, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:27,006 INFO L87 Difference]: Start difference. First operand 549 states and 1121 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:30,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:30,161 INFO L93 Difference]: Finished difference Result 1146 states and 2299 transitions. [2022-03-03 19:39:30,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-03 19:39:30,161 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:30,162 INFO L225 Difference]: With dead ends: 1146 [2022-03-03 19:39:30,162 INFO L226 Difference]: Without dead ends: 1118 [2022-03-03 19:39:30,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4453 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1493, Invalid=12549, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:39:30,163 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 241 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:30,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 418 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1932 Invalid, 0 Unknown, 392 Unchecked, 0.7s Time] [2022-03-03 19:39:30,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2022-03-03 19:39:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 548. [2022-03-03 19:39:30,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 547 states have (on average 2.045703839122486) internal successors, (1119), 547 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 1119 transitions. [2022-03-03 19:39:30,169 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 1119 transitions. Word has length 33 [2022-03-03 19:39:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:30,169 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 1119 transitions. [2022-03-03 19:39:30,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 1119 transitions. [2022-03-03 19:39:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:30,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:30,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:30,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-03 19:39:30,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:30,370 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:30,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:30,371 INFO L85 PathProgramCache]: Analyzing trace with hash -457813968, now seen corresponding path program 104 times [2022-03-03 19:39:30,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:30,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899771265] [2022-03-03 19:39:30,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:30,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:30,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:30,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899771265] [2022-03-03 19:39:30,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899771265] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:30,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530957972] [2022-03-03 19:39:30,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:39:30,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:30,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:30,619 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) [2022-03-03 19:39:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 19:39:30,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:39:30,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:30,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:30,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:30,902 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 27 treesize of output 13 [2022-03-03 19:39:31,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:31,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:31,507 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:31,508 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 42 treesize of output 60 [2022-03-03 19:39:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:31,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530957972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:31,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:31,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:31,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175279228] [2022-03-03 19:39:31,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:31,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:31,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1465, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:31,553 INFO L87 Difference]: Start difference. First operand 548 states and 1119 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:33,268 INFO L93 Difference]: Finished difference Result 873 states and 1752 transitions. [2022-03-03 19:39:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:39:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:33,269 INFO L225 Difference]: With dead ends: 873 [2022-03-03 19:39:33,269 INFO L226 Difference]: Without dead ends: 841 [2022-03-03 19:39:33,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=630, Invalid=6012, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:39:33,270 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:33,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 431 Invalid, 1997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1775 Invalid, 0 Unknown, 143 Unchecked, 0.6s Time] [2022-03-03 19:39:33,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-03 19:39:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 549. [2022-03-03 19:39:33,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.045620437956204) internal successors, (1121), 548 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:33,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1121 transitions. [2022-03-03 19:39:33,275 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1121 transitions. Word has length 33 [2022-03-03 19:39:33,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:33,275 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1121 transitions. [2022-03-03 19:39:33,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:33,275 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1121 transitions. [2022-03-03 19:39:33,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:33,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:33,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:33,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-03 19:39:33,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:33,477 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:33,477 INFO L85 PathProgramCache]: Analyzing trace with hash 968428398, now seen corresponding path program 105 times [2022-03-03 19:39:33,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:33,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767335003] [2022-03-03 19:39:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:33,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:33,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:33,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:33,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767335003] [2022-03-03 19:39:33,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767335003] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:33,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554751833] [2022-03-03 19:39:33,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:39:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:33,725 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) [2022-03-03 19:39:33,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 19:39:33,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:39:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:39:33,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:34,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:34,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:34,035 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 27 treesize of output 13 [2022-03-03 19:39:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:34,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:34,764 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:34,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-03-03 19:39:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:34,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554751833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:34,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:34,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:39:34,823 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238394901] [2022-03-03 19:39:34,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:34,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:39:34,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:39:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:39:34,823 INFO L87 Difference]: Start difference. First operand 549 states and 1121 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:38,109 INFO L93 Difference]: Finished difference Result 1055 states and 2099 transitions. [2022-03-03 19:39:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:39:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:38,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:38,111 INFO L225 Difference]: With dead ends: 1055 [2022-03-03 19:39:38,111 INFO L226 Difference]: Without dead ends: 985 [2022-03-03 19:39:38,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4171 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1429, Invalid=12377, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:39:38,112 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 325 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:38,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 423 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 2559 Invalid, 0 Unknown, 102 Unchecked, 0.9s Time] [2022-03-03 19:39:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-03-03 19:39:38,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 557. [2022-03-03 19:39:38,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 2.0449640287769784) internal successors, (1137), 556 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1137 transitions. [2022-03-03 19:39:38,117 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1137 transitions. Word has length 33 [2022-03-03 19:39:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:38,117 INFO L470 AbstractCegarLoop]: Abstraction has 557 states and 1137 transitions. [2022-03-03 19:39:38,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1137 transitions. [2022-03-03 19:39:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:38,118 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:38,118 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:38,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-03 19:39:38,318 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,SelfDestructingSolverStorable110 [2022-03-03 19:39:38,319 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:38,319 INFO L85 PathProgramCache]: Analyzing trace with hash 420173180, now seen corresponding path program 106 times [2022-03-03 19:39:38,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:38,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899790653] [2022-03-03 19:39:38,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:38,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:38,569 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:38,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899790653] [2022-03-03 19:39:38,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899790653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:38,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251248248] [2022-03-03 19:39:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:39:38,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:38,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:38,570 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) [2022-03-03 19:39:38,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 19:39:38,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:39:38,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:38,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:38,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:38,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:38,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:38,963 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 27 treesize of output 13 [2022-03-03 19:39:39,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:39,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:39,492 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:39,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:39:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:39,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251248248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:39,550 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:39,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:39,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278558366] [2022-03-03 19:39:39,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:39,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:39,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:39,551 INFO L87 Difference]: Start difference. First operand 557 states and 1137 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:41,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:41,279 INFO L93 Difference]: Finished difference Result 903 states and 1811 transitions. [2022-03-03 19:39:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:39:41,280 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:41,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:41,281 INFO L225 Difference]: With dead ends: 903 [2022-03-03 19:39:41,281 INFO L226 Difference]: Without dead ends: 855 [2022-03-03 19:39:41,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2219 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=629, Invalid=6681, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:39:41,281 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 208 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1629 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:41,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 394 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1629 Invalid, 0 Unknown, 178 Unchecked, 0.6s Time] [2022-03-03 19:39:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-03-03 19:39:41,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 561. [2022-03-03 19:39:41,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.044642857142857) internal successors, (1145), 560 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:41,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1145 transitions. [2022-03-03 19:39:41,287 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1145 transitions. Word has length 33 [2022-03-03 19:39:41,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:41,287 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1145 transitions. [2022-03-03 19:39:41,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:41,287 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1145 transitions. [2022-03-03 19:39:41,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:41,288 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:41,288 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:41,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:41,488 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,SelfDestructingSolverStorable111 [2022-03-03 19:39:41,488 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:41,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1805795770, now seen corresponding path program 107 times [2022-03-03 19:39:41,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:41,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085820457] [2022-03-03 19:39:41,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:41,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:41,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:41,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085820457] [2022-03-03 19:39:41,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085820457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:41,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038194654] [2022-03-03 19:39:41,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:39:41,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:41,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:41,742 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) [2022-03-03 19:39:41,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 19:39:41,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:39:41,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:41,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:39:41,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:42,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:42,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:42,116 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 25 treesize of output 13 [2022-03-03 19:39:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:42,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:42,645 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:42,646 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 42 treesize of output 60 [2022-03-03 19:39:42,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:42,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038194654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:42,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:42,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:42,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962938301] [2022-03-03 19:39:42,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:42,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:42,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:42,698 INFO L87 Difference]: Start difference. First operand 561 states and 1145 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:45,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:45,206 INFO L93 Difference]: Finished difference Result 1060 states and 2131 transitions. [2022-03-03 19:39:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:39:45,206 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:45,208 INFO L225 Difference]: With dead ends: 1060 [2022-03-03 19:39:45,208 INFO L226 Difference]: Without dead ends: 1006 [2022-03-03 19:39:45,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=875, Invalid=9025, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 19:39:45,209 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 244 mSDsluCounter, 959 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 754 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:45,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 621 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 2026 Invalid, 0 Unknown, 754 Unchecked, 0.7s Time] [2022-03-03 19:39:45,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-03-03 19:39:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 561. [2022-03-03 19:39:45,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.044642857142857) internal successors, (1145), 560 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:45,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1145 transitions. [2022-03-03 19:39:45,219 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1145 transitions. Word has length 33 [2022-03-03 19:39:45,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:45,219 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1145 transitions. [2022-03-03 19:39:45,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:45,219 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1145 transitions. [2022-03-03 19:39:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:45,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:45,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:45,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:45,420 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,SelfDestructingSolverStorable112 [2022-03-03 19:39:45,420 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:45,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:45,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1164685180, now seen corresponding path program 108 times [2022-03-03 19:39:45,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:45,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345552326] [2022-03-03 19:39:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:45,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:45,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:45,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:45,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345552326] [2022-03-03 19:39:45,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345552326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:45,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034316369] [2022-03-03 19:39:45,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:39:45,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:45,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:45,666 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) [2022-03-03 19:39:45,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 19:39:45,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:39:45,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:45,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:39:45,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:45,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:45,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:45,971 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 25 treesize of output 13 [2022-03-03 19:39:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:46,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:46,526 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:46,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:39:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:46,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034316369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:46,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:46,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:46,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209667059] [2022-03-03 19:39:46,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:46,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:46,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1461, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:46,580 INFO L87 Difference]: Start difference. First operand 561 states and 1145 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:50,207 INFO L93 Difference]: Finished difference Result 1152 states and 2296 transitions. [2022-03-03 19:39:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 19:39:50,208 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:50,209 INFO L225 Difference]: With dead ends: 1152 [2022-03-03 19:39:50,209 INFO L226 Difference]: Without dead ends: 1039 [2022-03-03 19:39:50,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5010 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1471, Invalid=14029, Unknown=0, NotChecked=0, Total=15500 [2022-03-03 19:39:50,210 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 337 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2672 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:50,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 623 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2672 Invalid, 0 Unknown, 68 Unchecked, 1.0s Time] [2022-03-03 19:39:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-03-03 19:39:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 575. [2022-03-03 19:39:50,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.043554006968641) internal successors, (1173), 574 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1173 transitions. [2022-03-03 19:39:50,216 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1173 transitions. Word has length 33 [2022-03-03 19:39:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:50,216 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1173 transitions. [2022-03-03 19:39:50,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1173 transitions. [2022-03-03 19:39:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:50,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:50,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:50,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:50,417 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,SelfDestructingSolverStorable113 [2022-03-03 19:39:50,418 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1704039750, now seen corresponding path program 109 times [2022-03-03 19:39:50,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:50,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650911181] [2022-03-03 19:39:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:50,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:50,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:50,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:50,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650911181] [2022-03-03 19:39:50,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650911181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:50,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810507747] [2022-03-03 19:39:50,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:39:50,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:50,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:50,665 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) [2022-03-03 19:39:50,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 19:39:50,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:50,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:50,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:50,971 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 27 treesize of output 13 [2022-03-03 19:39:51,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:51,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:51,538 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:51,538 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 42 treesize of output 60 [2022-03-03 19:39:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:51,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810507747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:51,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:51,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:51,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665405299] [2022-03-03 19:39:51,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:51,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:51,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:51,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:51,594 INFO L87 Difference]: Start difference. First operand 575 states and 1173 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:54,354 INFO L93 Difference]: Finished difference Result 1057 states and 2120 transitions. [2022-03-03 19:39:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:39:54,355 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:54,356 INFO L225 Difference]: With dead ends: 1057 [2022-03-03 19:39:54,356 INFO L226 Difference]: Without dead ends: 1029 [2022-03-03 19:39:54,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3217 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1101, Invalid=9405, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:39:54,357 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 272 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:54,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 384 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1517 Invalid, 0 Unknown, 73 Unchecked, 0.6s Time] [2022-03-03 19:39:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-03-03 19:39:54,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 574. [2022-03-03 19:39:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.043630017452007) internal successors, (1171), 573 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:54,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1171 transitions. [2022-03-03 19:39:54,363 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1171 transitions. Word has length 33 [2022-03-03 19:39:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:54,363 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1171 transitions. [2022-03-03 19:39:54,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1171 transitions. [2022-03-03 19:39:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:54,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:54,364 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:54,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-03 19:39:54,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:54,564 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1781141418, now seen corresponding path program 110 times [2022-03-03 19:39:54,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:54,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183274825] [2022-03-03 19:39:54,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:54,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:54,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:54,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:54,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183274825] [2022-03-03 19:39:54,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183274825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:54,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130059469] [2022-03-03 19:39:54,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:39:54,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:54,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:54,819 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) [2022-03-03 19:39:54,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 19:39:54,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:39:54,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:54,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:54,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:55,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:55,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:55,126 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 27 treesize of output 13 [2022-03-03 19:39:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:55,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:39:55,702 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:39:55,702 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 42 treesize of output 60 [2022-03-03 19:39:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:55,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130059469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:39:55,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:39:55,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:39:55,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864799414] [2022-03-03 19:39:55,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:39:55,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:39:55,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:39:55,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:39:55,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1457, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:39:55,761 INFO L87 Difference]: Start difference. First operand 574 states and 1171 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:39:58,672 INFO L93 Difference]: Finished difference Result 1188 states and 2369 transitions. [2022-03-03 19:39:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 19:39:58,672 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:39:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:39:58,673 INFO L225 Difference]: With dead ends: 1188 [2022-03-03 19:39:58,674 INFO L226 Difference]: Without dead ends: 1132 [2022-03-03 19:39:58,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3921 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1268, Invalid=11388, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:39:58,674 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 318 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:39:58,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 484 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1895 Invalid, 0 Unknown, 175 Unchecked, 0.7s Time] [2022-03-03 19:39:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-03-03 19:39:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 579. [2022-03-03 19:39:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 2.046712802768166) internal successors, (1183), 578 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1183 transitions. [2022-03-03 19:39:58,681 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1183 transitions. Word has length 33 [2022-03-03 19:39:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:39:58,681 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1183 transitions. [2022-03-03 19:39:58,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:39:58,681 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1183 transitions. [2022-03-03 19:39:58,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:39:58,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:39:58,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:39:58,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-03 19:39:58,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:58,884 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:39:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:39:58,885 INFO L85 PathProgramCache]: Analyzing trace with hash -785128862, now seen corresponding path program 111 times [2022-03-03 19:39:58,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:39:58,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420204695] [2022-03-03 19:39:58,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:39:58,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:39:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:39:59,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:59,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:39:59,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420204695] [2022-03-03 19:39:59,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420204695] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:39:59,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838925488] [2022-03-03 19:39:59,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:39:59,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:39:59,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:39:59,137 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) [2022-03-03 19:39:59,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 19:39:59,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:39:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:39:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:39:59,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:39:59,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:39:59,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:39:59,423 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 27 treesize of output 13 [2022-03-03 19:39:59,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:39:59,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:00,004 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:00,004 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 42 treesize of output 60 [2022-03-03 19:40:00,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:00,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838925488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:00,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:00,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:00,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617139942] [2022-03-03 19:40:00,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:00,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:00,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:00,050 INFO L87 Difference]: Start difference. First operand 579 states and 1183 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:02,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:02,646 INFO L93 Difference]: Finished difference Result 1103 states and 2209 transitions. [2022-03-03 19:40:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:40:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:02,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:02,648 INFO L225 Difference]: With dead ends: 1103 [2022-03-03 19:40:02,648 INFO L226 Difference]: Without dead ends: 1039 [2022-03-03 19:40:02,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3254 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1048, Invalid=9872, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:40:02,648 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 259 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:02,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 493 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 2419 Invalid, 0 Unknown, 192 Unchecked, 0.9s Time] [2022-03-03 19:40:02,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2022-03-03 19:40:02,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 601. [2022-03-03 19:40:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 2.0433333333333334) internal successors, (1226), 600 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:02,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1226 transitions. [2022-03-03 19:40:02,655 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1226 transitions. Word has length 33 [2022-03-03 19:40:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1226 transitions. [2022-03-03 19:40:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1226 transitions. [2022-03-03 19:40:02,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:02,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:02,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:02,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-03 19:40:02,871 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,SelfDestructingSolverStorable116 [2022-03-03 19:40:02,871 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash 641113504, now seen corresponding path program 112 times [2022-03-03 19:40:02,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:02,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126509764] [2022-03-03 19:40:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:02,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:03,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:03,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126509764] [2022-03-03 19:40:03,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126509764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:03,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954799668] [2022-03-03 19:40:03,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:40:03,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:03,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:03,117 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) [2022-03-03 19:40:03,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 19:40:03,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:40:03,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:03,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:03,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:03,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:03,395 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 27 treesize of output 13 [2022-03-03 19:40:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:03,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:03,982 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:03,982 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 42 treesize of output 60 [2022-03-03 19:40:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:04,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954799668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:04,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:04,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:04,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803477458] [2022-03-03 19:40:04,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:04,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:04,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:04,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:04,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:04,029 INFO L87 Difference]: Start difference. First operand 601 states and 1226 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:07,576 INFO L93 Difference]: Finished difference Result 1153 states and 2288 transitions. [2022-03-03 19:40:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 19:40:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:07,577 INFO L225 Difference]: With dead ends: 1153 [2022-03-03 19:40:07,577 INFO L226 Difference]: Without dead ends: 1069 [2022-03-03 19:40:07,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5495 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1663, Invalid=15629, Unknown=0, NotChecked=0, Total=17292 [2022-03-03 19:40:07,578 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 376 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 2695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:07,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 402 Invalid, 2695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2331 Invalid, 0 Unknown, 134 Unchecked, 0.9s Time] [2022-03-03 19:40:07,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2022-03-03 19:40:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 611. [2022-03-03 19:40:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 610 states have (on average 2.040983606557377) internal successors, (1245), 610 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 1245 transitions. [2022-03-03 19:40:07,585 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 1245 transitions. Word has length 33 [2022-03-03 19:40:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:07,585 INFO L470 AbstractCegarLoop]: Abstraction has 611 states and 1245 transitions. [2022-03-03 19:40:07,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 1245 transitions. [2022-03-03 19:40:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:07,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:07,586 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:07,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:07,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:07,786 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:07,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:07,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1676294800, now seen corresponding path program 113 times [2022-03-03 19:40:07,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:07,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057312956] [2022-03-03 19:40:07,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:08,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:08,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057312956] [2022-03-03 19:40:08,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057312956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:08,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685210660] [2022-03-03 19:40:08,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:40:08,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:08,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:08,067 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) [2022-03-03 19:40:08,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 19:40:08,087 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:40:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:40:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:08,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:08,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:08,350 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 25 treesize of output 13 [2022-03-03 19:40:08,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:08,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:08,957 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:08,957 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 42 treesize of output 60 [2022-03-03 19:40:08,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:09,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685210660] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:09,000 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:09,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:09,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814297568] [2022-03-03 19:40:09,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:09,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:09,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:09,000 INFO L87 Difference]: Start difference. First operand 611 states and 1245 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:12,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:12,117 INFO L93 Difference]: Finished difference Result 1094 states and 2178 transitions. [2022-03-03 19:40:12,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:40:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:12,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:12,118 INFO L225 Difference]: With dead ends: 1094 [2022-03-03 19:40:12,118 INFO L226 Difference]: Without dead ends: 1010 [2022-03-03 19:40:12,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1266, Invalid=12306, Unknown=0, NotChecked=0, Total=13572 [2022-03-03 19:40:12,119 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 334 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 2704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:12,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 450 Invalid, 2704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 2389 Invalid, 0 Unknown, 146 Unchecked, 0.9s Time] [2022-03-03 19:40:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2022-03-03 19:40:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 619. [2022-03-03 19:40:12,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.0388349514563107) internal successors, (1260), 618 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1260 transitions. [2022-03-03 19:40:12,125 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1260 transitions. Word has length 33 [2022-03-03 19:40:12,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:12,125 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1260 transitions. [2022-03-03 19:40:12,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:12,125 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1260 transitions. [2022-03-03 19:40:12,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:12,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:12,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:12,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:12,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:12,326 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:12,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1392173570, now seen corresponding path program 114 times [2022-03-03 19:40:12,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:12,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993157762] [2022-03-03 19:40:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:12,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:12,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:12,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993157762] [2022-03-03 19:40:12,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993157762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:12,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443113615] [2022-03-03 19:40:12,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:40:12,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:12,583 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) [2022-03-03 19:40:12,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 19:40:12,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:40:12,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:12,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:12,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:13,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:13,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:13,021 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 25 treesize of output 13 [2022-03-03 19:40:13,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:13,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:13,628 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:13,628 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 47 treesize of output 63 [2022-03-03 19:40:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:13,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443113615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:13,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:13,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:40:13,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260916258] [2022-03-03 19:40:13,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:13,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:40:13,680 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:40:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1763, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:40:13,680 INFO L87 Difference]: Start difference. First operand 619 states and 1260 transitions. Second operand has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:15,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:15,745 INFO L93 Difference]: Finished difference Result 968 states and 1927 transitions. [2022-03-03 19:40:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:40:15,746 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:15,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:15,747 INFO L225 Difference]: With dead ends: 968 [2022-03-03 19:40:15,747 INFO L226 Difference]: Without dead ends: 935 [2022-03-03 19:40:15,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=774, Invalid=7968, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:40:15,747 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 186 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1953 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:15,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 488 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1953 Invalid, 0 Unknown, 176 Unchecked, 0.7s Time] [2022-03-03 19:40:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-03-03 19:40:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 638. [2022-03-03 19:40:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.0313971742543173) internal successors, (1294), 637 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1294 transitions. [2022-03-03 19:40:15,753 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1294 transitions. Word has length 33 [2022-03-03 19:40:15,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:15,753 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1294 transitions. [2022-03-03 19:40:15,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 44 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1294 transitions. [2022-03-03 19:40:15,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:15,754 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:15,754 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:15,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-03 19:40:15,954 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,SelfDestructingSolverStorable119 [2022-03-03 19:40:15,955 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1427176148, now seen corresponding path program 115 times [2022-03-03 19:40:15,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:15,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835115924] [2022-03-03 19:40:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:15,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:16,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835115924] [2022-03-03 19:40:16,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835115924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454587319] [2022-03-03 19:40:16,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:40:16,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:16,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:16,211 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) [2022-03-03 19:40:16,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 19:40:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:16,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:16,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:16,590 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 27 treesize of output 13 [2022-03-03 19:40:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:16,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:17,124 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:17,124 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 42 treesize of output 60 [2022-03-03 19:40:17,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:17,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454587319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:17,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:17,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:17,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014427088] [2022-03-03 19:40:17,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:17,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:17,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:17,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:17,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:17,170 INFO L87 Difference]: Start difference. First operand 638 states and 1294 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:19,197 INFO L93 Difference]: Finished difference Result 995 states and 1973 transitions. [2022-03-03 19:40:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:40:19,197 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:19,198 INFO L225 Difference]: With dead ends: 995 [2022-03-03 19:40:19,198 INFO L226 Difference]: Without dead ends: 897 [2022-03-03 19:40:19,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=698, Invalid=7492, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:40:19,199 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:19,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 485 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1869 Invalid, 0 Unknown, 394 Unchecked, 0.7s Time] [2022-03-03 19:40:19,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-03 19:40:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 623. [2022-03-03 19:40:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 622 states have (on average 2.036977491961415) internal successors, (1267), 622 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 1267 transitions. [2022-03-03 19:40:19,205 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 1267 transitions. Word has length 33 [2022-03-03 19:40:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:19,205 INFO L470 AbstractCegarLoop]: Abstraction has 623 states and 1267 transitions. [2022-03-03 19:40:19,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:19,205 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 1267 transitions. [2022-03-03 19:40:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:19,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:19,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:19,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-03 19:40:19,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:19,406 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:19,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:19,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1435416782, now seen corresponding path program 116 times [2022-03-03 19:40:19,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:19,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982534629] [2022-03-03 19:40:19,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:19,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:19,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:19,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:19,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982534629] [2022-03-03 19:40:19,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982534629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:19,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941377539] [2022-03-03 19:40:19,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:40:19,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:19,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:19,671 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) [2022-03-03 19:40:19,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 19:40:19,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:40:19,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:19,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:19,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:20,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:20,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:20,051 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 27 treesize of output 13 [2022-03-03 19:40:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:20,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:20,572 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:20,573 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 42 treesize of output 60 [2022-03-03 19:40:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:20,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941377539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:20,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:20,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:20,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755617057] [2022-03-03 19:40:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:20,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:20,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:20,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:20,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1473, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:20,630 INFO L87 Difference]: Start difference. First operand 623 states and 1267 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:22,435 INFO L93 Difference]: Finished difference Result 1006 states and 2022 transitions. [2022-03-03 19:40:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:40:22,435 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:22,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:22,436 INFO L225 Difference]: With dead ends: 1006 [2022-03-03 19:40:22,436 INFO L226 Difference]: Without dead ends: 970 [2022-03-03 19:40:22,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=685, Invalid=7147, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 19:40:22,437 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:22,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 370 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1364 Invalid, 0 Unknown, 440 Unchecked, 0.5s Time] [2022-03-03 19:40:22,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-03-03 19:40:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 619. [2022-03-03 19:40:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.033980582524272) internal successors, (1257), 618 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1257 transitions. [2022-03-03 19:40:22,443 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1257 transitions. Word has length 33 [2022-03-03 19:40:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:22,443 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1257 transitions. [2022-03-03 19:40:22,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:22,443 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1257 transitions. [2022-03-03 19:40:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:22,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:22,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:22,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-03 19:40:22,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:22,644 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:22,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:22,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1679711078, now seen corresponding path program 117 times [2022-03-03 19:40:22,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:22,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980760122] [2022-03-03 19:40:22,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:22,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:22,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:22,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:22,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980760122] [2022-03-03 19:40:22,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980760122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:22,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80343261] [2022-03-03 19:40:22,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:40:22,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:22,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:22,897 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) [2022-03-03 19:40:22,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 19:40:22,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:40:22,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:22,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:22,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:23,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:23,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:23,282 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 27 treesize of output 13 [2022-03-03 19:40:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:23,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:23,823 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:23,824 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 42 treesize of output 60 [2022-03-03 19:40:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:23,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80343261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:23,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:23,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:23,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513332120] [2022-03-03 19:40:23,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:23,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:23,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:23,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:23,875 INFO L87 Difference]: Start difference. First operand 619 states and 1257 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:27,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:27,726 INFO L93 Difference]: Finished difference Result 1196 states and 2379 transitions. [2022-03-03 19:40:27,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-03-03 19:40:27,726 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:27,728 INFO L225 Difference]: With dead ends: 1196 [2022-03-03 19:40:27,728 INFO L226 Difference]: Without dead ends: 1129 [2022-03-03 19:40:27,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 44 SyntacticMatches, 14 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6916 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1387, Invalid=17795, Unknown=0, NotChecked=0, Total=19182 [2022-03-03 19:40:27,729 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 295 mSDsluCounter, 749 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:27,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 490 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2375 Invalid, 0 Unknown, 460 Unchecked, 0.9s Time] [2022-03-03 19:40:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-03-03 19:40:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 671. [2022-03-03 19:40:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 2.0283582089552237) internal successors, (1359), 670 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1359 transitions. [2022-03-03 19:40:27,736 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1359 transitions. Word has length 33 [2022-03-03 19:40:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:27,736 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 1359 transitions. [2022-03-03 19:40:27,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1359 transitions. [2022-03-03 19:40:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:27,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:27,736 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:27,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-03 19:40:27,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-03 19:40:27,937 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1410568192, now seen corresponding path program 118 times [2022-03-03 19:40:27,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:27,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412718439] [2022-03-03 19:40:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:27,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:28,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:28,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412718439] [2022-03-03 19:40:28,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412718439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:28,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574095414] [2022-03-03 19:40:28,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:40:28,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:28,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:28,190 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) [2022-03-03 19:40:28,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 19:40:28,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:40:28,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:28,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:28,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:28,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:28,552 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 27 treesize of output 13 [2022-03-03 19:40:28,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:28,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:29,097 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:29,097 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 42 treesize of output 60 [2022-03-03 19:40:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:29,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574095414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:29,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:29,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:29,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242881264] [2022-03-03 19:40:29,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:29,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:29,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1476, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:29,150 INFO L87 Difference]: Start difference. First operand 671 states and 1359 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:33,907 INFO L93 Difference]: Finished difference Result 1327 states and 2613 transitions. [2022-03-03 19:40:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-03 19:40:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:33,909 INFO L225 Difference]: With dead ends: 1327 [2022-03-03 19:40:33,909 INFO L226 Difference]: Without dead ends: 1200 [2022-03-03 19:40:33,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8265 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1775, Invalid=22095, Unknown=0, NotChecked=0, Total=23870 [2022-03-03 19:40:33,910 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 349 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 3518 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 3518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:33,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 734 Invalid, 3896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 3518 Invalid, 0 Unknown, 197 Unchecked, 1.3s Time] [2022-03-03 19:40:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-03-03 19:40:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 663. [2022-03-03 19:40:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 2.027190332326284) internal successors, (1342), 662 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:33,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 1342 transitions. [2022-03-03 19:40:33,918 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 1342 transitions. Word has length 33 [2022-03-03 19:40:33,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:33,918 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 1342 transitions. [2022-03-03 19:40:33,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:33,918 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 1342 transitions. [2022-03-03 19:40:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:33,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:33,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:33,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:34,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:34,131 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:34,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:34,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1038600488, now seen corresponding path program 119 times [2022-03-03 19:40:34,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:34,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368076406] [2022-03-03 19:40:34,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:34,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:34,377 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:34,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:34,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368076406] [2022-03-03 19:40:34,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368076406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:34,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005937083] [2022-03-03 19:40:34,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:40:34,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:34,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:34,379 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) [2022-03-03 19:40:34,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-03 19:40:34,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:40:34,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:34,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:40:34,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:34,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:34,673 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 27 treesize of output 13 [2022-03-03 19:40:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:34,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:35,355 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:35,356 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 49 treesize of output 63 [2022-03-03 19:40:35,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:35,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005937083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:35,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:35,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-03 19:40:35,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638717402] [2022-03-03 19:40:35,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:35,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:40:35,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:35,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:40:35,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:40:35,407 INFO L87 Difference]: Start difference. First operand 663 states and 1342 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:41,815 INFO L93 Difference]: Finished difference Result 1281 states and 2543 transitions. [2022-03-03 19:40:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-03 19:40:41,815 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:41,816 INFO L225 Difference]: With dead ends: 1281 [2022-03-03 19:40:41,816 INFO L226 Difference]: Without dead ends: 1217 [2022-03-03 19:40:41,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9595 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1969, Invalid=24763, Unknown=0, NotChecked=0, Total=26732 [2022-03-03 19:40:41,817 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 340 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 3772 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 4360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 3772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:41,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 601 Invalid, 4360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 3772 Invalid, 0 Unknown, 398 Unchecked, 1.4s Time] [2022-03-03 19:40:41,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-03-03 19:40:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 668. [2022-03-03 19:40:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 2.028485757121439) internal successors, (1353), 667 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:41,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1353 transitions. [2022-03-03 19:40:41,824 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1353 transitions. Word has length 33 [2022-03-03 19:40:41,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:41,825 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 1353 transitions. [2022-03-03 19:40:41,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:41,825 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1353 transitions. [2022-03-03 19:40:41,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:41,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:41,825 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:41,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-03 19:40:42,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-03 19:40:42,026 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:42,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:42,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1830124442, now seen corresponding path program 120 times [2022-03-03 19:40:42,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:42,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663907616] [2022-03-03 19:40:42,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:42,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:42,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:42,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:42,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663907616] [2022-03-03 19:40:42,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663907616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:42,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647116863] [2022-03-03 19:40:42,279 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:40:42,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:42,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:42,280 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) [2022-03-03 19:40:42,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-03 19:40:42,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:40:42,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:42,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:40:42,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:42,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:42,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:42,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:42,579 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 25 treesize of output 13 [2022-03-03 19:40:42,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:42,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:43,153 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:43,153 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 42 treesize of output 60 [2022-03-03 19:40:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:43,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647116863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:43,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:43,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:43,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634226186] [2022-03-03 19:40:43,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:43,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:43,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1472, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:43,202 INFO L87 Difference]: Start difference. First operand 668 states and 1353 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:49,590 INFO L93 Difference]: Finished difference Result 1461 states and 2885 transitions. [2022-03-03 19:40:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-03 19:40:49,590 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:49,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:49,591 INFO L225 Difference]: With dead ends: 1461 [2022-03-03 19:40:49,591 INFO L226 Difference]: Without dead ends: 1361 [2022-03-03 19:40:49,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10672 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2766, Invalid=26646, Unknown=0, NotChecked=0, Total=29412 [2022-03-03 19:40:49,593 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 421 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 4936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:49,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 928 Invalid, 4936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 4097 Invalid, 0 Unknown, 538 Unchecked, 1.5s Time] [2022-03-03 19:40:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-03-03 19:40:49,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 730. [2022-03-03 19:40:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.0205761316872426) internal successors, (1473), 729 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1473 transitions. [2022-03-03 19:40:49,601 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1473 transitions. Word has length 33 [2022-03-03 19:40:49,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:49,601 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1473 transitions. [2022-03-03 19:40:49,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:49,601 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1473 transitions. [2022-03-03 19:40:49,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:49,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:49,602 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:49,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-03 19:40:49,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-03 19:40:49,803 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:49,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash -456720104, now seen corresponding path program 121 times [2022-03-03 19:40:49,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:49,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558408144] [2022-03-03 19:40:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:49,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:50,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:50,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558408144] [2022-03-03 19:40:50,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558408144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:50,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649138546] [2022-03-03 19:40:50,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:40:50,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:50,050 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) [2022-03-03 19:40:50,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-03 19:40:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:50,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:50,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:50,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:50,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:50,347 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 27 treesize of output 13 [2022-03-03 19:40:50,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:50,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:50,913 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:50,913 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 42 treesize of output 60 [2022-03-03 19:40:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:50,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649138546] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:50,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:50,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:50,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610298904] [2022-03-03 19:40:50,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:50,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:50,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:50,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:50,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:50,966 INFO L87 Difference]: Start difference. First operand 730 states and 1473 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:55,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:40:55,788 INFO L93 Difference]: Finished difference Result 1337 states and 2659 transitions. [2022-03-03 19:40:55,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-03 19:40:55,789 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:40:55,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:40:55,790 INFO L225 Difference]: With dead ends: 1337 [2022-03-03 19:40:55,790 INFO L226 Difference]: Without dead ends: 1281 [2022-03-03 19:40:55,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7430 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2074, Invalid=19388, Unknown=0, NotChecked=0, Total=21462 [2022-03-03 19:40:55,791 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 363 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 3680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:40:55,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 566 Invalid, 3680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 2788 Invalid, 0 Unknown, 597 Unchecked, 1.1s Time] [2022-03-03 19:40:55,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2022-03-03 19:40:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 694. [2022-03-03 19:40:55,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 2.0274170274170276) internal successors, (1405), 693 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:55,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1405 transitions. [2022-03-03 19:40:55,798 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1405 transitions. Word has length 33 [2022-03-03 19:40:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:40:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 1405 transitions. [2022-03-03 19:40:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:40:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1405 transitions. [2022-03-03 19:40:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:40:55,799 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:40:55,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:40:55,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-03 19:40:56,000 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,SelfDestructingSolverStorable126 [2022-03-03 19:40:56,001 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:40:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:40:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -101427426, now seen corresponding path program 122 times [2022-03-03 19:40:56,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:40:56,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992377846] [2022-03-03 19:40:56,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:40:56,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:40:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:40:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:56,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:40:56,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992377846] [2022-03-03 19:40:56,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992377846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:40:56,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466017783] [2022-03-03 19:40:56,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:40:56,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:40:56,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:40:56,248 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) [2022-03-03 19:40:56,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-03 19:40:56,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:40:56,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:40:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:40:56,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:40:56,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:40:56,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:40:56,513 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 27 treesize of output 13 [2022-03-03 19:40:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:56,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:40:57,104 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:40:57,104 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 42 treesize of output 60 [2022-03-03 19:40:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:40:57,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466017783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:40:57,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:40:57,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:40:57,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888135718] [2022-03-03 19:40:57,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:40:57,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:40:57,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:40:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:40:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:40:57,150 INFO L87 Difference]: Start difference. First operand 694 states and 1405 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:01,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:01,641 INFO L93 Difference]: Finished difference Result 1283 states and 2512 transitions. [2022-03-03 19:41:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-03-03 19:41:01,642 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:01,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:01,649 INFO L225 Difference]: With dead ends: 1283 [2022-03-03 19:41:01,649 INFO L226 Difference]: Without dead ends: 1178 [2022-03-03 19:41:01,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7471 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1728, Invalid=20028, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 19:41:01,650 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 349 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:01,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 603 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 3496 Invalid, 0 Unknown, 11 Unchecked, 1.3s Time] [2022-03-03 19:41:01,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-03-03 19:41:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 706. [2022-03-03 19:41:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 2.022695035460993) internal successors, (1426), 705 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1426 transitions. [2022-03-03 19:41:01,657 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1426 transitions. Word has length 33 [2022-03-03 19:41:01,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:01,658 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 1426 transitions. [2022-03-03 19:41:01,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1426 transitions. [2022-03-03 19:41:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:01,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:01,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:01,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-03 19:41:01,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:01,860 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1324814940, now seen corresponding path program 123 times [2022-03-03 19:41:01,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:01,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443724038] [2022-03-03 19:41:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:02,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:02,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443724038] [2022-03-03 19:41:02,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443724038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:02,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806586714] [2022-03-03 19:41:02,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:02,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:02,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:02,108 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) [2022-03-03 19:41:02,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-03 19:41:02,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:41:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:02,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:02,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:02,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:02,373 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 27 treesize of output 13 [2022-03-03 19:41:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:02,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:02,955 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:02,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:41:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:03,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806586714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:03,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:03,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:41:03,014 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744589360] [2022-03-03 19:41:03,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:03,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:41:03,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:41:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1464, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:41:03,015 INFO L87 Difference]: Start difference. First operand 706 states and 1426 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:08,849 INFO L93 Difference]: Finished difference Result 1306 states and 2578 transitions. [2022-03-03 19:41:08,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-03 19:41:08,849 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:08,850 INFO L225 Difference]: With dead ends: 1306 [2022-03-03 19:41:08,850 INFO L226 Difference]: Without dead ends: 1238 [2022-03-03 19:41:08,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10719 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2619, Invalid=27483, Unknown=0, NotChecked=0, Total=30102 [2022-03-03 19:41:08,852 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 405 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 3158 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:08,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 453 Invalid, 3513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3158 Invalid, 0 Unknown, 89 Unchecked, 1.2s Time] [2022-03-03 19:41:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2022-03-03 19:41:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 716. [2022-03-03 19:41:08,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.018181818181818) internal successors, (1443), 715 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1443 transitions. [2022-03-03 19:41:08,859 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1443 transitions. Word has length 33 [2022-03-03 19:41:08,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:08,859 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 1443 transitions. [2022-03-03 19:41:08,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:08,860 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1443 transitions. [2022-03-03 19:41:08,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:08,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:08,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:08,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:09,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:09,063 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:09,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:09,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1934971060, now seen corresponding path program 124 times [2022-03-03 19:41:09,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:09,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80193163] [2022-03-03 19:41:09,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:09,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:09,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:09,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:09,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80193163] [2022-03-03 19:41:09,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80193163] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:09,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601363797] [2022-03-03 19:41:09,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:09,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:09,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:09,314 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) [2022-03-03 19:41:09,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-03 19:41:09,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:09,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:09,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:09,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:09,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:09,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:09,589 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 27 treesize of output 13 [2022-03-03 19:41:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:09,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:10,167 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:10,167 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 42 treesize of output 60 [2022-03-03 19:41:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:10,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601363797] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:10,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:10,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 40 [2022-03-03 19:41:10,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552226302] [2022-03-03 19:41:10,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:10,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:41:10,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:10,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:41:10,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:41:10,222 INFO L87 Difference]: Start difference. First operand 716 states and 1443 transitions. Second operand has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:14,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:14,627 INFO L93 Difference]: Finished difference Result 1257 states and 2482 transitions. [2022-03-03 19:41:14,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-03 19:41:14,627 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:14,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:14,629 INFO L225 Difference]: With dead ends: 1257 [2022-03-03 19:41:14,629 INFO L226 Difference]: Without dead ends: 1189 [2022-03-03 19:41:14,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7412 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1859, Invalid=20491, Unknown=0, NotChecked=0, Total=22350 [2022-03-03 19:41:14,630 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 328 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:14,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 427 Invalid, 2924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2509 Invalid, 0 Unknown, 233 Unchecked, 1.0s Time] [2022-03-03 19:41:14,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2022-03-03 19:41:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 723. [2022-03-03 19:41:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 2.0166204986149583) internal successors, (1456), 722 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:14,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1456 transitions. [2022-03-03 19:41:14,636 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1456 transitions. Word has length 33 [2022-03-03 19:41:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:14,637 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1456 transitions. [2022-03-03 19:41:14,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1456 transitions. [2022-03-03 19:41:14,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:14,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:14,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:14,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-03 19:41:14,838 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,SelfDestructingSolverStorable129 [2022-03-03 19:41:14,838 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:14,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1614609616, now seen corresponding path program 125 times [2022-03-03 19:41:14,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:14,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848001593] [2022-03-03 19:41:14,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:14,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:15,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:15,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848001593] [2022-03-03 19:41:15,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848001593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:15,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063682465] [2022-03-03 19:41:15,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:15,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:15,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:15,127 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) [2022-03-03 19:41:15,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-03 19:41:15,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:41:15,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:15,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:41:15,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:15,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:15,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:15,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:15,530 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 25 treesize of output 13 [2022-03-03 19:41:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:15,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:16,070 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:16,070 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 42 treesize of output 60 [2022-03-03 19:41:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:16,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063682465] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:16,123 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:16,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:16,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669070523] [2022-03-03 19:41:16,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:16,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:16,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:16,124 INFO L87 Difference]: Start difference. First operand 723 states and 1456 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:17,452 INFO L93 Difference]: Finished difference Result 1091 states and 2133 transitions. [2022-03-03 19:41:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:41:17,452 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:17,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:17,453 INFO L225 Difference]: With dead ends: 1091 [2022-03-03 19:41:17,453 INFO L226 Difference]: Without dead ends: 1027 [2022-03-03 19:41:17,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=4716, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:41:17,454 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 147 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 1874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:17,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 850 Invalid, 1874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1632 Invalid, 0 Unknown, 208 Unchecked, 0.6s Time] [2022-03-03 19:41:17,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-03-03 19:41:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 738. [2022-03-03 19:41:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.020352781546811) internal successors, (1489), 737 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1489 transitions. [2022-03-03 19:41:17,461 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1489 transitions. Word has length 33 [2022-03-03 19:41:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:17,461 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1489 transitions. [2022-03-03 19:41:17,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1489 transitions. [2022-03-03 19:41:17,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:17,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:17,462 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:17,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:17,679 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,SelfDestructingSolverStorable130 [2022-03-03 19:41:17,679 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:17,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:17,679 INFO L85 PathProgramCache]: Analyzing trace with hash -60860770, now seen corresponding path program 126 times [2022-03-03 19:41:17,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:17,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890961276] [2022-03-03 19:41:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:17,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:17,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:17,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890961276] [2022-03-03 19:41:17,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890961276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:17,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186689186] [2022-03-03 19:41:17,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:17,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:17,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:17,944 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) [2022-03-03 19:41:17,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-03 19:41:17,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:41:17,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:17,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:41:17,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:18,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:18,353 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 25 treesize of output 13 [2022-03-03 19:41:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:18,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:18,894 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:18,894 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 42 treesize of output 60 [2022-03-03 19:41:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:18,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186689186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:18,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:18,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:18,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817849222] [2022-03-03 19:41:18,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:18,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:18,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:18,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:18,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:18,952 INFO L87 Difference]: Start difference. First operand 738 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:20,184 INFO L93 Difference]: Finished difference Result 1131 states and 2245 transitions. [2022-03-03 19:41:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:41:20,185 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:20,186 INFO L225 Difference]: With dead ends: 1131 [2022-03-03 19:41:20,186 INFO L226 Difference]: Without dead ends: 1124 [2022-03-03 19:41:20,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=424, Invalid=4832, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:41:20,187 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 177 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:20,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 520 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1117 Invalid, 0 Unknown, 394 Unchecked, 0.4s Time] [2022-03-03 19:41:20,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-03-03 19:41:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 754. [2022-03-03 19:41:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.0212483399734396) internal successors, (1522), 753 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1522 transitions. [2022-03-03 19:41:20,199 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1522 transitions. Word has length 33 [2022-03-03 19:41:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:20,199 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1522 transitions. [2022-03-03 19:41:20,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:20,199 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1522 transitions. [2022-03-03 19:41:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:20,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:20,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:20,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:20,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:20,400 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:20,401 INFO L85 PathProgramCache]: Analyzing trace with hash -837246742, now seen corresponding path program 127 times [2022-03-03 19:41:20,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:20,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004825717] [2022-03-03 19:41:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:20,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:20,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:20,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004825717] [2022-03-03 19:41:20,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004825717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:20,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78061517] [2022-03-03 19:41:20,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:41:20,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:20,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:20,674 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) [2022-03-03 19:41:20,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-03 19:41:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:20,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:21,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:21,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:21,086 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 27 treesize of output 13 [2022-03-03 19:41:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:21,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:21,626 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:21,626 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 42 treesize of output 60 [2022-03-03 19:41:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:21,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78061517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:21,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:21,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:21,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619897375] [2022-03-03 19:41:21,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:21,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:21,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:21,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:21,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:21,672 INFO L87 Difference]: Start difference. First operand 754 states and 1522 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:22,838 INFO L93 Difference]: Finished difference Result 1118 states and 2216 transitions. [2022-03-03 19:41:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:41:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:22,840 INFO L225 Difference]: With dead ends: 1118 [2022-03-03 19:41:22,840 INFO L226 Difference]: Without dead ends: 1086 [2022-03-03 19:41:22,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=409, Invalid=4703, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:41:22,841 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 167 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:22,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 437 Invalid, 1334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1074 Invalid, 0 Unknown, 216 Unchecked, 0.4s Time] [2022-03-03 19:41:22,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-03-03 19:41:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 761. [2022-03-03 19:41:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.011842105263158) internal successors, (1529), 760 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1529 transitions. [2022-03-03 19:41:22,848 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1529 transitions. Word has length 33 [2022-03-03 19:41:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:22,848 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1529 transitions. [2022-03-03 19:41:22,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1529 transitions. [2022-03-03 19:41:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:22,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:22,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:22,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:23,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:23,050 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -461564830, now seen corresponding path program 128 times [2022-03-03 19:41:23,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:23,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611404867] [2022-03-03 19:41:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:23,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:23,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611404867] [2022-03-03 19:41:23,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611404867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:23,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645729427] [2022-03-03 19:41:23,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:41:23,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:23,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:23,315 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) [2022-03-03 19:41:23,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-03 19:41:23,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:41:23,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:23,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:23,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:23,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:23,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:23,721 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 27 treesize of output 13 [2022-03-03 19:41:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:23,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:24,255 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:24,255 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 42 treesize of output 60 [2022-03-03 19:41:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:24,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645729427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:24,311 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:24,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:24,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398810330] [2022-03-03 19:41:24,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:24,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:24,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:24,312 INFO L87 Difference]: Start difference. First operand 761 states and 1529 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:25,647 INFO L93 Difference]: Finished difference Result 1236 states and 2406 transitions. [2022-03-03 19:41:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:41:25,648 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:25,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:25,649 INFO L225 Difference]: With dead ends: 1236 [2022-03-03 19:41:25,649 INFO L226 Difference]: Without dead ends: 1140 [2022-03-03 19:41:25,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 39 SyntacticMatches, 12 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1742 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=449, Invalid=5403, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:41:25,650 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 214 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:25,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 487 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1253 Invalid, 0 Unknown, 380 Unchecked, 0.5s Time] [2022-03-03 19:41:25,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-03-03 19:41:25,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 757. [2022-03-03 19:41:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 2.009259259259259) internal successors, (1519), 756 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1519 transitions. [2022-03-03 19:41:25,657 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1519 transitions. Word has length 33 [2022-03-03 19:41:25,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:25,657 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1519 transitions. [2022-03-03 19:41:25,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:25,657 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1519 transitions. [2022-03-03 19:41:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:25,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:25,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:25,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-03 19:41:25,858 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,SelfDestructingSolverStorable133 [2022-03-03 19:41:25,858 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1803233456, now seen corresponding path program 129 times [2022-03-03 19:41:25,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:25,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137641056] [2022-03-03 19:41:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:26,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:26,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137641056] [2022-03-03 19:41:26,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137641056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:26,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946763283] [2022-03-03 19:41:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:26,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:26,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:26,112 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) [2022-03-03 19:41:26,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-03 19:41:26,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:41:26,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:26,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:41:26,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:26,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:26,516 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 25 treesize of output 13 [2022-03-03 19:41:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:26,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:27,057 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:27,057 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 42 treesize of output 60 [2022-03-03 19:41:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:27,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946763283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:27,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:27,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:27,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041902721] [2022-03-03 19:41:27,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:27,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:27,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:27,115 INFO L87 Difference]: Start difference. First operand 757 states and 1519 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:28,424 INFO L93 Difference]: Finished difference Result 1127 states and 2221 transitions. [2022-03-03 19:41:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:41:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:28,425 INFO L225 Difference]: With dead ends: 1127 [2022-03-03 19:41:28,425 INFO L226 Difference]: Without dead ends: 1097 [2022-03-03 19:41:28,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=435, Invalid=4967, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:41:28,426 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 158 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 635 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:28,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 592 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1313 Invalid, 0 Unknown, 635 Unchecked, 0.5s Time] [2022-03-03 19:41:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-03-03 19:41:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 738. [2022-03-03 19:41:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 2.020352781546811) internal successors, (1489), 737 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1489 transitions. [2022-03-03 19:41:28,433 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1489 transitions. Word has length 33 [2022-03-03 19:41:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:28,433 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1489 transitions. [2022-03-03 19:41:28,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1489 transitions. [2022-03-03 19:41:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:28,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:28,434 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:28,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-03 19:41:28,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-03 19:41:28,634 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:28,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:28,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1400985966, now seen corresponding path program 130 times [2022-03-03 19:41:28,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:28,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930483870] [2022-03-03 19:41:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:28,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:28,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:28,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930483870] [2022-03-03 19:41:28,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930483870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:28,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461684283] [2022-03-03 19:41:28,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:28,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:28,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:28,888 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) [2022-03-03 19:41:28,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-03 19:41:28,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:28,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:28,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:28,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:29,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:29,309 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 27 treesize of output 13 [2022-03-03 19:41:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:29,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:29,856 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:29,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:41:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:29,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461684283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:29,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:29,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:29,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171839053] [2022-03-03 19:41:29,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:29,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:29,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:29,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:29,904 INFO L87 Difference]: Start difference. First operand 738 states and 1489 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:31,190 INFO L93 Difference]: Finished difference Result 1037 states and 2053 transitions. [2022-03-03 19:41:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:41:31,191 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:31,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:31,192 INFO L225 Difference]: With dead ends: 1037 [2022-03-03 19:41:31,192 INFO L226 Difference]: Without dead ends: 1004 [2022-03-03 19:41:31,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=403, Invalid=4567, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:41:31,192 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 131 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 420 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:31,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 647 Invalid, 1862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1405 Invalid, 0 Unknown, 420 Unchecked, 0.5s Time] [2022-03-03 19:41:31,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-03-03 19:41:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 754. [2022-03-03 19:41:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 2.0119521912350598) internal successors, (1515), 753 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1515 transitions. [2022-03-03 19:41:31,199 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1515 transitions. Word has length 33 [2022-03-03 19:41:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:31,199 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 1515 transitions. [2022-03-03 19:41:31,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:31,199 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1515 transitions. [2022-03-03 19:41:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:31,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:31,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:31,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:31,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-03 19:41:31,400 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1848452472, now seen corresponding path program 131 times [2022-03-03 19:41:31,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:31,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190472730] [2022-03-03 19:41:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:31,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:31,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:31,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190472730] [2022-03-03 19:41:31,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190472730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:31,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411072744] [2022-03-03 19:41:31,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:31,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:31,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:31,667 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) [2022-03-03 19:41:31,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-03 19:41:31,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:41:31,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:31,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:31,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:32,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:32,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:32,122 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 25 treesize of output 13 [2022-03-03 19:41:32,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:32,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:32,755 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:32,755 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 47 treesize of output 63 [2022-03-03 19:41:32,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:32,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411072744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:32,815 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:32,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:41:32,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504021136] [2022-03-03 19:41:32,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:32,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:41:32,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:32,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:41:32,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:41:32,816 INFO L87 Difference]: Start difference. First operand 754 states and 1515 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:34,627 INFO L93 Difference]: Finished difference Result 1164 states and 2305 transitions. [2022-03-03 19:41:34,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:41:34,627 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:34,628 INFO L225 Difference]: With dead ends: 1164 [2022-03-03 19:41:34,628 INFO L226 Difference]: Without dead ends: 1144 [2022-03-03 19:41:34,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2202 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=561, Invalid=6579, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:41:34,629 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 144 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 1796 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 2346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:34,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 681 Invalid, 2346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1796 Invalid, 0 Unknown, 502 Unchecked, 0.6s Time] [2022-03-03 19:41:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-03-03 19:41:34,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 758. [2022-03-03 19:41:34,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 2.0132100396301187) internal successors, (1524), 757 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:34,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 1524 transitions. [2022-03-03 19:41:34,636 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 1524 transitions. Word has length 33 [2022-03-03 19:41:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:34,637 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 1524 transitions. [2022-03-03 19:41:34,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 1524 transitions. [2022-03-03 19:41:34,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:34,637 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:34,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:34,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-03 19:41:34,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-03 19:41:34,838 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:34,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1963111564, now seen corresponding path program 132 times [2022-03-03 19:41:34,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:34,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88757710] [2022-03-03 19:41:34,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:34,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:35,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:35,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88757710] [2022-03-03 19:41:35,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88757710] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:35,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613303472] [2022-03-03 19:41:35,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:35,108 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) [2022-03-03 19:41:35,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-03 19:41:35,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:41:35,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:35,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:41:35,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:35,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:35,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:35,508 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 13 [2022-03-03 19:41:35,653 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:35,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:36,054 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:36,054 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 42 treesize of output 60 [2022-03-03 19:41:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:36,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613303472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:36,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:36,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:36,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410279509] [2022-03-03 19:41:36,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:36,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:36,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1561, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:36,102 INFO L87 Difference]: Start difference. First operand 758 states and 1524 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:37,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:37,600 INFO L93 Difference]: Finished difference Result 1176 states and 2344 transitions. [2022-03-03 19:41:37,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:41:37,600 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:37,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:37,601 INFO L225 Difference]: With dead ends: 1176 [2022-03-03 19:41:37,601 INFO L226 Difference]: Without dead ends: 1132 [2022-03-03 19:41:37,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=488, Invalid=5364, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:41:37,602 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 161 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 563 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:37,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 578 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1413 Invalid, 0 Unknown, 563 Unchecked, 0.5s Time] [2022-03-03 19:41:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-03-03 19:41:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 739. [2022-03-03 19:41:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.0203252032520327) internal successors, (1491), 738 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1491 transitions. [2022-03-03 19:41:37,609 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1491 transitions. Word has length 33 [2022-03-03 19:41:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:37,609 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1491 transitions. [2022-03-03 19:41:37,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1491 transitions. [2022-03-03 19:41:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:37,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:37,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:37,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-03 19:41:37,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:37,810 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:37,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash -15363376, now seen corresponding path program 133 times [2022-03-03 19:41:37,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:37,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501796325] [2022-03-03 19:41:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:38,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:38,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:38,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501796325] [2022-03-03 19:41:38,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501796325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:38,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257290793] [2022-03-03 19:41:38,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:41:38,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:38,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:38,075 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) [2022-03-03 19:41:38,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-03 19:41:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:38,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:38,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:38,475 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 27 treesize of output 13 [2022-03-03 19:41:38,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:38,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:39,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:39,033 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 42 treesize of output 60 [2022-03-03 19:41:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:39,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257290793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:39,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:39,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:39,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258032686] [2022-03-03 19:41:39,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:39,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:39,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:39,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:39,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:39,086 INFO L87 Difference]: Start difference. First operand 739 states and 1491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:41,363 INFO L93 Difference]: Finished difference Result 1419 states and 2829 transitions. [2022-03-03 19:41:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:41:41,363 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:41,364 INFO L225 Difference]: With dead ends: 1419 [2022-03-03 19:41:41,364 INFO L226 Difference]: Without dead ends: 1375 [2022-03-03 19:41:41,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=738, Invalid=8192, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:41:41,365 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 203 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 2856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 674 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:41,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 716 Invalid, 2856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2113 Invalid, 0 Unknown, 674 Unchecked, 0.7s Time] [2022-03-03 19:41:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2022-03-03 19:41:41,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 742. [2022-03-03 19:41:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.020242914979757) internal successors, (1497), 741 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1497 transitions. [2022-03-03 19:41:41,373 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1497 transitions. Word has length 33 [2022-03-03 19:41:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 742 states and 1497 transitions. [2022-03-03 19:41:41,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1497 transitions. [2022-03-03 19:41:41,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:41,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:41,374 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:41,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-03 19:41:41,574 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,SelfDestructingSolverStorable138 [2022-03-03 19:41:41,574 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash -656473966, now seen corresponding path program 134 times [2022-03-03 19:41:41,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:41,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044061947] [2022-03-03 19:41:41,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:41,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:41,823 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:41,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044061947] [2022-03-03 19:41:41,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044061947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:41,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977713077] [2022-03-03 19:41:41,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:41:41,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:41,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:41,824 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) [2022-03-03 19:41:41,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-03 19:41:41,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:41:41,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:41,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:42,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:42,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:42,174 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 27 treesize of output 13 [2022-03-03 19:41:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:42,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:42,765 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:42,765 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 42 treesize of output 60 [2022-03-03 19:41:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:42,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977713077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:42,822 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:42,822 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:42,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895920] [2022-03-03 19:41:42,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:42,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:42,823 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:42,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:42,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:42,823 INFO L87 Difference]: Start difference. First operand 742 states and 1497 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:45,086 INFO L93 Difference]: Finished difference Result 1369 states and 2749 transitions. [2022-03-03 19:41:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:41:45,086 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:45,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:45,088 INFO L225 Difference]: With dead ends: 1369 [2022-03-03 19:41:45,088 INFO L226 Difference]: Without dead ends: 1337 [2022-03-03 19:41:45,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2565 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=841, Invalid=7531, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:41:45,089 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 225 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1476 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 895 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:45,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 666 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1476 Invalid, 0 Unknown, 895 Unchecked, 0.5s Time] [2022-03-03 19:41:45,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-03-03 19:41:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 739. [2022-03-03 19:41:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 2.0203252032520327) internal successors, (1491), 738 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 1491 transitions. [2022-03-03 19:41:45,096 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 1491 transitions. Word has length 33 [2022-03-03 19:41:45,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:45,097 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 1491 transitions. [2022-03-03 19:41:45,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 1491 transitions. [2022-03-03 19:41:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:45,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:45,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:45,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-03-03 19:41:45,298 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,SelfDestructingSolverStorable139 [2022-03-03 19:41:45,298 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:45,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:45,298 INFO L85 PathProgramCache]: Analyzing trace with hash 769768400, now seen corresponding path program 135 times [2022-03-03 19:41:45,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:45,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779767085] [2022-03-03 19:41:45,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:45,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:45,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:45,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779767085] [2022-03-03 19:41:45,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779767085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:45,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497388931] [2022-03-03 19:41:45,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:41:45,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:45,555 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) [2022-03-03 19:41:45,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-03 19:41:45,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:41:45,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:45,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:45,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:45,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:45,892 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 27 treesize of output 13 [2022-03-03 19:41:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:46,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:46,497 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:46,498 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 42 treesize of output 60 [2022-03-03 19:41:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:46,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497388931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:46,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:46,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:46,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145215369] [2022-03-03 19:41:46,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:46,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:46,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:46,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:46,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:46,557 INFO L87 Difference]: Start difference. First operand 739 states and 1491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:49,663 INFO L93 Difference]: Finished difference Result 1452 states and 2890 transitions. [2022-03-03 19:41:49,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:41:49,663 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:49,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:49,665 INFO L225 Difference]: With dead ends: 1452 [2022-03-03 19:41:49,665 INFO L226 Difference]: Without dead ends: 1424 [2022-03-03 19:41:49,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1182, Invalid=9738, Unknown=0, NotChecked=0, Total=10920 [2022-03-03 19:41:49,666 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 287 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 2607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 721 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:49,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 717 Invalid, 2607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1775 Invalid, 0 Unknown, 721 Unchecked, 0.6s Time] [2022-03-03 19:41:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2022-03-03 19:41:49,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 735. [2022-03-03 19:41:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.016348773841962) internal successors, (1480), 734 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1480 transitions. [2022-03-03 19:41:49,674 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1480 transitions. Word has length 33 [2022-03-03 19:41:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 1480 transitions. [2022-03-03 19:41:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:49,674 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1480 transitions. [2022-03-03 19:41:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:49,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:49,675 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:49,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:49,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:49,875 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1124068932, now seen corresponding path program 136 times [2022-03-03 19:41:49,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:49,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936882689] [2022-03-03 19:41:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:50,139 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:50,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936882689] [2022-03-03 19:41:50,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936882689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:50,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854800960] [2022-03-03 19:41:50,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:41:50,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:50,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:50,140 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) [2022-03-03 19:41:50,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-03 19:41:50,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:41:50,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:50,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:50,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:50,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:50,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:50,559 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 27 treesize of output 13 [2022-03-03 19:41:50,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:50,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:51,096 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:51,096 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 42 treesize of output 60 [2022-03-03 19:41:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:51,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854800960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:51,156 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:51,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:51,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246834026] [2022-03-03 19:41:51,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:51,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:51,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:51,157 INFO L87 Difference]: Start difference. First operand 735 states and 1480 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:52,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:52,434 INFO L93 Difference]: Finished difference Result 1011 states and 2010 transitions. [2022-03-03 19:41:52,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-03 19:41:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:52,435 INFO L225 Difference]: With dead ends: 1011 [2022-03-03 19:41:52,435 INFO L226 Difference]: Without dead ends: 975 [2022-03-03 19:41:52,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=422, Invalid=4690, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:41:52,436 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:52,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 551 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1481 Invalid, 0 Unknown, 183 Unchecked, 0.5s Time] [2022-03-03 19:41:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-03-03 19:41:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 746. [2022-03-03 19:41:52,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 746 states, 745 states have (on average 2.0134228187919465) internal successors, (1500), 745 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:52,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 1500 transitions. [2022-03-03 19:41:52,443 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 1500 transitions. Word has length 33 [2022-03-03 19:41:52,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:52,443 INFO L470 AbstractCegarLoop]: Abstraction has 746 states and 1500 transitions. [2022-03-03 19:41:52,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:52,443 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 1500 transitions. [2022-03-03 19:41:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:52,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:52,443 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:52,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:52,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:52,644 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1900454904, now seen corresponding path program 137 times [2022-03-03 19:41:52,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:52,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016395922] [2022-03-03 19:41:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:52,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:52,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:52,897 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:52,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016395922] [2022-03-03 19:41:52,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016395922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:52,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914004173] [2022-03-03 19:41:52,897 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:41:52,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:52,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:52,898 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) [2022-03-03 19:41:52,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-03 19:41:52,917 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:41:52,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:52,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:52,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:53,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:53,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:53,328 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 25 treesize of output 13 [2022-03-03 19:41:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:53,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:54,002 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:54,003 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 49 treesize of output 63 [2022-03-03 19:41:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:54,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914004173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:54,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:54,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:41:54,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222451245] [2022-03-03 19:41:54,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:54,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:41:54,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:41:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:41:54,050 INFO L87 Difference]: Start difference. First operand 746 states and 1500 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:55,519 INFO L93 Difference]: Finished difference Result 1092 states and 2189 transitions. [2022-03-03 19:41:55,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:41:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:55,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:55,521 INFO L225 Difference]: With dead ends: 1092 [2022-03-03 19:41:55,521 INFO L226 Difference]: Without dead ends: 1043 [2022-03-03 19:41:55,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1797 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=495, Invalid=5667, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:41:55,522 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 156 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 2035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 359 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:55,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 524 Invalid, 2035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1631 Invalid, 0 Unknown, 359 Unchecked, 0.6s Time] [2022-03-03 19:41:55,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-03 19:41:55,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 737. [2022-03-03 19:41:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.016304347826087) internal successors, (1484), 736 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1484 transitions. [2022-03-03 19:41:55,528 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1484 transitions. Word has length 33 [2022-03-03 19:41:55,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:55,529 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1484 transitions. [2022-03-03 19:41:55,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1484 transitions. [2022-03-03 19:41:55,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:55,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:55,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:55,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-03 19:41:55,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:55,730 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash 261553658, now seen corresponding path program 138 times [2022-03-03 19:41:55,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:55,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135313204] [2022-03-03 19:41:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:55,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:55,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:55,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135313204] [2022-03-03 19:41:55,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135313204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:55,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456847111] [2022-03-03 19:41:55,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:41:55,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:55,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:55,983 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) [2022-03-03 19:41:55,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-03 19:41:56,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:41:56,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:41:56,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:56,398 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 27 treesize of output 13 [2022-03-03 19:41:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:56,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:56,941 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:56,941 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 42 treesize of output 60 [2022-03-03 19:41:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:56,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456847111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:56,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:56,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:56,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118132282] [2022-03-03 19:41:56,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:56,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:56,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:56,996 INFO L87 Difference]: Start difference. First operand 737 states and 1484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:41:58,358 INFO L93 Difference]: Finished difference Result 1001 states and 1990 transitions. [2022-03-03 19:41:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:41:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:41:58,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:41:58,360 INFO L225 Difference]: With dead ends: 1001 [2022-03-03 19:41:58,360 INFO L226 Difference]: Without dead ends: 969 [2022-03-03 19:41:58,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=490, Invalid=5210, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:41:58,361 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 201 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:41:58,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 380 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 994 Invalid, 0 Unknown, 670 Unchecked, 0.4s Time] [2022-03-03 19:41:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-03-03 19:41:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 752. [2022-03-03 19:41:58,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 2.0119840213049267) internal successors, (1511), 751 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 1511 transitions. [2022-03-03 19:41:58,367 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 1511 transitions. Word has length 33 [2022-03-03 19:41:58,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:41:58,367 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 1511 transitions. [2022-03-03 19:41:58,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:41:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 1511 transitions. [2022-03-03 19:41:58,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:41:58,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:41:58,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:41:58,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-03 19:41:58,568 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,SelfDestructingSolverStorable143 [2022-03-03 19:41:58,568 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:41:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:41:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash -7589228, now seen corresponding path program 139 times [2022-03-03 19:41:58,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:41:58,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847613375] [2022-03-03 19:41:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:41:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:41:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:58,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:41:58,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847613375] [2022-03-03 19:41:58,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847613375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:41:58,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691538160] [2022-03-03 19:41:58,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:41:58,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:41:58,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:41:58,827 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) [2022-03-03 19:41:58,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-03 19:41:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:41:58,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:41:58,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:41:59,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:41:59,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:41:59,224 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 27 treesize of output 13 [2022-03-03 19:41:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:59,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:41:59,768 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:41:59,769 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 42 treesize of output 60 [2022-03-03 19:41:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:41:59,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691538160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:41:59,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:41:59,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:41:59,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398686300] [2022-03-03 19:41:59,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:41:59,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:41:59,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:41:59,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:41:59,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:41:59,812 INFO L87 Difference]: Start difference. First operand 752 states and 1511 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:01,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:01,306 INFO L93 Difference]: Finished difference Result 1049 states and 2068 transitions. [2022-03-03 19:42:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:42:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:01,308 INFO L225 Difference]: With dead ends: 1049 [2022-03-03 19:42:01,308 INFO L226 Difference]: Without dead ends: 972 [2022-03-03 19:42:01,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 10 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1812 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=523, Invalid=5797, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:42:01,308 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 170 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:01,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 493 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1404 Invalid, 0 Unknown, 200 Unchecked, 0.5s Time] [2022-03-03 19:42:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-03-03 19:42:01,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 740. [2022-03-03 19:42:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.016238159675237) internal successors, (1490), 739 states have internal predecessors, (1490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:01,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1490 transitions. [2022-03-03 19:42:01,315 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1490 transitions. Word has length 33 [2022-03-03 19:42:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:01,315 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 1490 transitions. [2022-03-03 19:42:01,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1490 transitions. [2022-03-03 19:42:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:01,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:01,316 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:01,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-03 19:42:01,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-03 19:42:01,517 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -379556932, now seen corresponding path program 140 times [2022-03-03 19:42:01,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:01,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046581449] [2022-03-03 19:42:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:01,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:01,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:01,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:01,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046581449] [2022-03-03 19:42:01,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046581449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:01,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740051325] [2022-03-03 19:42:01,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:42:01,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:01,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:01,768 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:01,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-03 19:42:01,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:42:01,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:01,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:01,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:02,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:02,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:02,108 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 27 treesize of output 13 [2022-03-03 19:42:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:02,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:02,691 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:02,691 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 42 treesize of output 60 [2022-03-03 19:42:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:02,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740051325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:02,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:02,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:02,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984249789] [2022-03-03 19:42:02,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:02,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:02,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:02,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:02,746 INFO L87 Difference]: Start difference. First operand 740 states and 1490 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:04,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:04,577 INFO L93 Difference]: Finished difference Result 1168 states and 2313 transitions. [2022-03-03 19:42:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 19:42:04,578 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:04,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:04,579 INFO L225 Difference]: With dead ends: 1168 [2022-03-03 19:42:04,579 INFO L226 Difference]: Without dead ends: 1136 [2022-03-03 19:42:04,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2260 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=756, Invalid=7076, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 19:42:04,580 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 1605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:04,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 459 Invalid, 1605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1263 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2022-03-03 19:42:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-03-03 19:42:04,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 737. [2022-03-03 19:42:04,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 2.016304347826087) internal successors, (1484), 736 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:04,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1484 transitions. [2022-03-03 19:42:04,591 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1484 transitions. Word has length 33 [2022-03-03 19:42:04,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:04,591 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 1484 transitions. [2022-03-03 19:42:04,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1484 transitions. [2022-03-03 19:42:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:04,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:04,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:04,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:04,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-03 19:42:04,793 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:04,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1046685434, now seen corresponding path program 141 times [2022-03-03 19:42:04,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:04,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342123082] [2022-03-03 19:42:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:04,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:05,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:05,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342123082] [2022-03-03 19:42:05,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342123082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:05,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421082626] [2022-03-03 19:42:05,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:42:05,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:05,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:05,042 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-03 19:42:05,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:42:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:05,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:05,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:05,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:05,384 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 27 treesize of output 13 [2022-03-03 19:42:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:05,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:05,981 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:05,982 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 42 treesize of output 60 [2022-03-03 19:42:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:06,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421082626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:06,035 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:06,035 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:06,035 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979074280] [2022-03-03 19:42:06,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:06,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:06,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:06,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:06,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:06,036 INFO L87 Difference]: Start difference. First operand 737 states and 1484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:08,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:08,468 INFO L93 Difference]: Finished difference Result 1265 states and 2518 transitions. [2022-03-03 19:42:08,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:42:08,468 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:08,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:08,470 INFO L225 Difference]: With dead ends: 1265 [2022-03-03 19:42:08,470 INFO L226 Difference]: Without dead ends: 1237 [2022-03-03 19:42:08,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1006, Invalid=8306, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:42:08,471 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 226 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:08,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 439 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1433 Invalid, 0 Unknown, 415 Unchecked, 0.5s Time] [2022-03-03 19:42:08,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2022-03-03 19:42:08,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 736. [2022-03-03 19:42:08,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 2.016326530612245) internal successors, (1482), 735 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:08,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1482 transitions. [2022-03-03 19:42:08,478 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1482 transitions. Word has length 33 [2022-03-03 19:42:08,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:08,478 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 1482 transitions. [2022-03-03 19:42:08,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1482 transitions. [2022-03-03 19:42:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:08,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:08,479 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:08,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-03 19:42:08,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:08,680 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:08,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:08,680 INFO L85 PathProgramCache]: Analyzing trace with hash -548232470, now seen corresponding path program 142 times [2022-03-03 19:42:08,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:08,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162451951] [2022-03-03 19:42:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:08,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:08,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:08,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:08,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162451951] [2022-03-03 19:42:08,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162451951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:08,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80950979] [2022-03-03 19:42:08,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:42:08,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:08,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:08,945 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:08,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-03 19:42:08,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:42:08,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:08,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:09,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:09,362 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 27 treesize of output 13 [2022-03-03 19:42:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:09,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:09,923 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:09,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:42:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:09,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80950979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:09,966 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:09,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:09,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212742053] [2022-03-03 19:42:09,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:09,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:09,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:09,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:09,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:09,967 INFO L87 Difference]: Start difference. First operand 736 states and 1482 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:11,414 INFO L93 Difference]: Finished difference Result 1163 states and 2303 transitions. [2022-03-03 19:42:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:42:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:11,415 INFO L225 Difference]: With dead ends: 1163 [2022-03-03 19:42:11,415 INFO L226 Difference]: Without dead ends: 1091 [2022-03-03 19:42:11,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=516, Invalid=5490, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:42:11,416 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 182 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:11,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 478 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1223 Invalid, 0 Unknown, 584 Unchecked, 0.4s Time] [2022-03-03 19:42:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-03-03 19:42:11,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 756. [2022-03-03 19:42:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.0119205298013245) internal successors, (1519), 755 states have internal predecessors, (1519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:11,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1519 transitions. [2022-03-03 19:42:11,423 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1519 transitions. Word has length 33 [2022-03-03 19:42:11,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:11,424 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1519 transitions. [2022-03-03 19:42:11,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:11,424 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1519 transitions. [2022-03-03 19:42:11,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:11,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:11,424 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:11,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-03 19:42:11,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-03 19:42:11,631 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash -817375356, now seen corresponding path program 143 times [2022-03-03 19:42:11,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:11,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785564986] [2022-03-03 19:42:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:11,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:11,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:11,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785564986] [2022-03-03 19:42:11,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785564986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:11,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19621861] [2022-03-03 19:42:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:42:11,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:11,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:11,889 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:11,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-03 19:42:11,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:42:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:11,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:12,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:12,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:12,365 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 25 treesize of output 13 [2022-03-03 19:42:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:12,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:12,999 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:12,999 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 47 treesize of output 63 [2022-03-03 19:42:13,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:13,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19621861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:13,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:13,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:42:13,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185414003] [2022-03-03 19:42:13,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:13,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:42:13,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:42:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:42:13,058 INFO L87 Difference]: Start difference. First operand 756 states and 1519 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:14,298 INFO L93 Difference]: Finished difference Result 1039 states and 2065 transitions. [2022-03-03 19:42:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:42:14,298 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:14,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:14,300 INFO L225 Difference]: With dead ends: 1039 [2022-03-03 19:42:14,300 INFO L226 Difference]: Without dead ends: 1021 [2022-03-03 19:42:14,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 33 SyntacticMatches, 10 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=467, Invalid=4935, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:42:14,300 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 135 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:14,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 440 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1396 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2022-03-03 19:42:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1021 states. [2022-03-03 19:42:14,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1021 to 756. [2022-03-03 19:42:14,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.009271523178808) internal successors, (1517), 755 states have internal predecessors, (1517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:14,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1517 transitions. [2022-03-03 19:42:14,307 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1517 transitions. Word has length 33 [2022-03-03 19:42:14,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:14,307 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1517 transitions. [2022-03-03 19:42:14,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:14,307 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1517 transitions. [2022-03-03 19:42:14,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:14,308 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:14,308 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:14,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-03 19:42:14,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-03 19:42:14,509 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:14,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:14,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2066337224, now seen corresponding path program 144 times [2022-03-03 19:42:14,509 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:14,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819073249] [2022-03-03 19:42:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:14,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:14,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:14,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819073249] [2022-03-03 19:42:14,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819073249] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:14,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024166990] [2022-03-03 19:42:14,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:42:14,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:14,767 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:14,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-03 19:42:14,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:42:14,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:42:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:15,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:15,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:15,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:15,169 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 25 treesize of output 13 [2022-03-03 19:42:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:15,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:15,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:15,973 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:42:15,973 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 47 treesize of output 55 [2022-03-03 19:42:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:16,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024166990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:16,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:16,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:42:16,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997053181] [2022-03-03 19:42:16,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:16,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:42:16,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:16,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:42:16,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2104, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:42:16,087 INFO L87 Difference]: Start difference. First operand 756 states and 1517 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:21,464 INFO L93 Difference]: Finished difference Result 1602 states and 3115 transitions. [2022-03-03 19:42:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-03 19:42:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:21,465 INFO L225 Difference]: With dead ends: 1602 [2022-03-03 19:42:21,465 INFO L226 Difference]: Without dead ends: 1445 [2022-03-03 19:42:21,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 34 SyntacticMatches, 13 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5934 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1958, Invalid=18064, Unknown=0, NotChecked=0, Total=20022 [2022-03-03 19:42:21,466 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 390 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2807 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 3846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 2807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 831 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:21,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 732 Invalid, 3846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 2807 Invalid, 0 Unknown, 831 Unchecked, 1.1s Time] [2022-03-03 19:42:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-03-03 19:42:21,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 821. [2022-03-03 19:42:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-03-03 19:42:21,476 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-03-03 19:42:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:21,476 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-03-03 19:42:21,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-03-03 19:42:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:21,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:21,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:21,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-03 19:42:21,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:21,677 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1189343060, now seen corresponding path program 145 times [2022-03-03 19:42:21,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:21,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923475949] [2022-03-03 19:42:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:21,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:21,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923475949] [2022-03-03 19:42:21,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923475949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:21,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173938285] [2022-03-03 19:42:21,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:42:21,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:21,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:21,927 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:21,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-03 19:42:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:21,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:21,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:22,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:22,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:22,273 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 27 treesize of output 13 [2022-03-03 19:42:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:22,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:22,855 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:22,855 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 42 treesize of output 60 [2022-03-03 19:42:22,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:22,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173938285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:22,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:22,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:22,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683482756] [2022-03-03 19:42:22,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:22,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:22,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:22,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1541, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:22,913 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:24,536 INFO L93 Difference]: Finished difference Result 1211 states and 2412 transitions. [2022-03-03 19:42:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:42:24,536 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:24,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:24,537 INFO L225 Difference]: With dead ends: 1211 [2022-03-03 19:42:24,537 INFO L226 Difference]: Without dead ends: 1179 [2022-03-03 19:42:24,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1908 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=659, Invalid=5983, Unknown=0, NotChecked=0, Total=6642 [2022-03-03 19:42:24,538 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 262 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:24,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 411 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1367 Invalid, 0 Unknown, 262 Unchecked, 0.5s Time] [2022-03-03 19:42:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-03-03 19:42:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 821. [2022-03-03 19:42:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-03-03 19:42:24,546 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-03-03 19:42:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:24,546 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-03-03 19:42:24,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-03-03 19:42:24,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:24,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:24,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:24,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-03 19:42:24,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-03-03 19:42:24,747 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:24,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:24,748 INFO L85 PathProgramCache]: Analyzing trace with hash 236899306, now seen corresponding path program 146 times [2022-03-03 19:42:24,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:24,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261340939] [2022-03-03 19:42:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:24,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:24,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:24,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261340939] [2022-03-03 19:42:24,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261340939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:24,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080266411] [2022-03-03 19:42:24,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:42:24,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:24,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:24,997 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-03 19:42:25,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:42:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:25,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:25,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:25,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:25,335 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 27 treesize of output 13 [2022-03-03 19:42:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:25,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:25,925 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:25,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:42:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:25,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080266411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:25,972 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:25,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:25,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356991068] [2022-03-03 19:42:25,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:25,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:25,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:25,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:25,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:25,973 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:28,289 INFO L93 Difference]: Finished difference Result 1384 states and 2754 transitions. [2022-03-03 19:42:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:42:28,289 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:28,290 INFO L225 Difference]: With dead ends: 1384 [2022-03-03 19:42:28,290 INFO L226 Difference]: Without dead ends: 1356 [2022-03-03 19:42:28,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2676 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=976, Invalid=8336, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:42:28,291 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 199 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 592 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:28,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 555 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1698 Invalid, 0 Unknown, 592 Unchecked, 0.6s Time] [2022-03-03 19:42:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356 states. [2022-03-03 19:42:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1356 to 821. [2022-03-03 19:42:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 820 states have (on average 2.0134146341463413) internal successors, (1651), 820 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:28,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1651 transitions. [2022-03-03 19:42:28,300 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 1651 transitions. Word has length 33 [2022-03-03 19:42:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:28,300 INFO L470 AbstractCegarLoop]: Abstraction has 821 states and 1651 transitions. [2022-03-03 19:42:28,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 1651 transitions. [2022-03-03 19:42:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:28,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:28,301 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:28,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:28,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:28,501 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 614999010, now seen corresponding path program 147 times [2022-03-03 19:42:28,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:28,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554952238] [2022-03-03 19:42:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:28,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:28,753 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:28,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554952238] [2022-03-03 19:42:28,753 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554952238] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:28,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985915959] [2022-03-03 19:42:28,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:42:28,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:28,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:28,754 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:28,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-03 19:42:28,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:42:28,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:42:28,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:29,157 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 25 treesize of output 13 [2022-03-03 19:42:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:29,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:29,711 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:29,711 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 42 treesize of output 60 [2022-03-03 19:42:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:29,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985915959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:29,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:29,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:29,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649486618] [2022-03-03 19:42:29,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:29,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:29,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:29,757 INFO L87 Difference]: Start difference. First operand 821 states and 1651 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:31,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:31,014 INFO L93 Difference]: Finished difference Result 1152 states and 2297 transitions. [2022-03-03 19:42:31,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:42:31,014 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:31,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:31,016 INFO L225 Difference]: With dead ends: 1152 [2022-03-03 19:42:31,016 INFO L226 Difference]: Without dead ends: 1110 [2022-03-03 19:42:31,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=4946, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:42:31,017 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 153 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 482 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:31,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 513 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1262 Invalid, 0 Unknown, 482 Unchecked, 0.4s Time] [2022-03-03 19:42:31,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2022-03-03 19:42:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 802. [2022-03-03 19:42:31,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 2.0187265917602994) internal successors, (1617), 801 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:31,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1617 transitions. [2022-03-03 19:42:31,024 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1617 transitions. Word has length 33 [2022-03-03 19:42:31,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:31,025 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1617 transitions. [2022-03-03 19:42:31,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:31,025 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1617 transitions. [2022-03-03 19:42:31,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:31,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:31,025 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:31,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:31,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:31,226 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:31,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:31,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1965596322, now seen corresponding path program 148 times [2022-03-03 19:42:31,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:31,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533326051] [2022-03-03 19:42:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:31,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:31,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:31,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:31,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533326051] [2022-03-03 19:42:31,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533326051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:31,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798303461] [2022-03-03 19:42:31,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:42:31,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:31,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:31,471 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:31,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-03 19:42:31,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:42:31,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:31,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:31,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:31,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:31,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:31,789 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 27 treesize of output 13 [2022-03-03 19:42:31,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:31,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:32,404 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:32,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:42:32,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:32,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798303461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:32,470 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:32,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:32,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395443887] [2022-03-03 19:42:32,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:32,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:32,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:32,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:32,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:32,471 INFO L87 Difference]: Start difference. First operand 802 states and 1617 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:33,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:33,773 INFO L93 Difference]: Finished difference Result 1320 states and 2641 transitions. [2022-03-03 19:42:33,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:42:33,774 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:33,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:33,775 INFO L225 Difference]: With dead ends: 1320 [2022-03-03 19:42:33,775 INFO L226 Difference]: Without dead ends: 1288 [2022-03-03 19:42:33,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=494, Invalid=4908, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:42:33,776 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 162 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:33,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 404 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1420 Invalid, 0 Unknown, 275 Unchecked, 0.5s Time] [2022-03-03 19:42:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2022-03-03 19:42:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 803. [2022-03-03 19:42:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 2.018703241895262) internal successors, (1619), 802 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:33,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1619 transitions. [2022-03-03 19:42:33,784 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1619 transitions. Word has length 33 [2022-03-03 19:42:33,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:33,784 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 1619 transitions. [2022-03-03 19:42:33,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:33,785 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1619 transitions. [2022-03-03 19:42:33,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:33,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:33,785 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:33,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-03 19:42:33,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:33,986 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:33,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:33,986 INFO L85 PathProgramCache]: Analyzing trace with hash -903128608, now seen corresponding path program 149 times [2022-03-03 19:42:33,986 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:33,986 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351852204] [2022-03-03 19:42:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:33,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:34,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:34,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351852204] [2022-03-03 19:42:34,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351852204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:34,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363552267] [2022-03-03 19:42:34,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:42:34,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:34,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:34,238 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:34,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-03 19:42:34,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:42:34,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:34,258 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:42:34,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:34,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:34,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:34,568 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 27 treesize of output 13 [2022-03-03 19:42:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:34,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:35,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:35,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:35,455 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:42:35,455 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 47 treesize of output 55 [2022-03-03 19:42:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:35,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363552267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:35,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:35,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:42:35,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422273795] [2022-03-03 19:42:35,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:35,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:42:35,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:35,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:42:35,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:42:35,574 INFO L87 Difference]: Start difference. First operand 803 states and 1619 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:41,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:41,400 INFO L93 Difference]: Finished difference Result 1721 states and 3359 transitions. [2022-03-03 19:42:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-03-03 19:42:41,400 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:41,402 INFO L225 Difference]: With dead ends: 1721 [2022-03-03 19:42:41,402 INFO L226 Difference]: Without dead ends: 1597 [2022-03-03 19:42:41,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8048 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2641, Invalid=23119, Unknown=0, NotChecked=0, Total=25760 [2022-03-03 19:42:41,403 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 474 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 3554 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 3554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:41,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 812 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 3554 Invalid, 0 Unknown, 225 Unchecked, 1.4s Time] [2022-03-03 19:42:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2022-03-03 19:42:41,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 842. [2022-03-03 19:42:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-03-03 19:42:41,413 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-03-03 19:42:41,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:41,413 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-03-03 19:42:41,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:41,413 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-03-03 19:42:41,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:41,414 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:41,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:41,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:41,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:41,615 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:41,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:41,615 INFO L85 PathProgramCache]: Analyzing trace with hash 132052688, now seen corresponding path program 150 times [2022-03-03 19:42:41,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:41,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061095264] [2022-03-03 19:42:41,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:41,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:41,860 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:41,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061095264] [2022-03-03 19:42:41,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061095264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:41,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296226651] [2022-03-03 19:42:41,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:42:41,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:41,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:41,861 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:41,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-03 19:42:41,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:42:41,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:41,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:42:41,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:42,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:42,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:42,172 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 25 treesize of output 13 [2022-03-03 19:42:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:42,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:42,784 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:42,785 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 42 treesize of output 60 [2022-03-03 19:42:42,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:42,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296226651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:42,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:42,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:42,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751861079] [2022-03-03 19:42:42,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:42,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:42,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:42,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:42,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:42,835 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:44,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:44,204 INFO L93 Difference]: Finished difference Result 1155 states and 2310 transitions. [2022-03-03 19:42:44,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:42:44,205 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:44,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:44,206 INFO L225 Difference]: With dead ends: 1155 [2022-03-03 19:42:44,206 INFO L226 Difference]: Without dead ends: 1127 [2022-03-03 19:42:44,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=519, Invalid=5181, Unknown=0, NotChecked=0, Total=5700 [2022-03-03 19:42:44,206 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 150 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:44,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 436 Invalid, 1706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1502 Invalid, 0 Unknown, 151 Unchecked, 0.5s Time] [2022-03-03 19:42:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-03 19:42:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 841. [2022-03-03 19:42:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.0238095238095237) internal successors, (1700), 840 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:44,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1700 transitions. [2022-03-03 19:42:44,214 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1700 transitions. Word has length 33 [2022-03-03 19:42:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:44,215 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1700 transitions. [2022-03-03 19:42:44,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:44,215 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1700 transitions. [2022-03-03 19:42:44,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:44,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:44,216 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:44,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-03 19:42:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:44,416 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:44,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:44,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1686290802, now seen corresponding path program 151 times [2022-03-03 19:42:44,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:44,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111803246] [2022-03-03 19:42:44,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:44,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:44,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:44,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111803246] [2022-03-03 19:42:44,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111803246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:44,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40580350] [2022-03-03 19:42:44,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:42:44,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:44,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:44,670 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:44,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-03 19:42:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:44,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:44,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:45,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:45,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:45,083 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 27 treesize of output 13 [2022-03-03 19:42:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:45,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:45,627 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:45,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:42:45,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:45,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40580350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:45,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:45,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:45,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050432652] [2022-03-03 19:42:45,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:45,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:45,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:45,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:45,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:45,683 INFO L87 Difference]: Start difference. First operand 841 states and 1700 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:47,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:47,368 INFO L93 Difference]: Finished difference Result 1266 states and 2512 transitions. [2022-03-03 19:42:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:42:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:47,370 INFO L225 Difference]: With dead ends: 1266 [2022-03-03 19:42:47,370 INFO L226 Difference]: Without dead ends: 1202 [2022-03-03 19:42:47,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=554, Invalid=5926, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:42:47,370 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 186 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 335 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:47,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 566 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1626 Invalid, 0 Unknown, 335 Unchecked, 0.6s Time] [2022-03-03 19:42:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-03-03 19:42:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 863. [2022-03-03 19:42:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.01508120649652) internal successors, (1737), 862 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1737 transitions. [2022-03-03 19:42:47,378 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1737 transitions. Word has length 33 [2022-03-03 19:42:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:47,379 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 1737 transitions. [2022-03-03 19:42:47,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1737 transitions. [2022-03-03 19:42:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:47,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:47,380 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:47,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-03 19:42:47,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-03 19:42:47,580 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:47,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1816738172, now seen corresponding path program 152 times [2022-03-03 19:42:47,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:47,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716516595] [2022-03-03 19:42:47,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:47,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:47,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:47,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716516595] [2022-03-03 19:42:47,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716516595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:47,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894947980] [2022-03-03 19:42:47,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:42:47,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:47,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:47,840 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:47,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-03 19:42:47,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:42:47,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:47,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:48,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:48,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:48,269 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 27 treesize of output 13 [2022-03-03 19:42:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:48,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:48,816 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:48,817 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 42 treesize of output 60 [2022-03-03 19:42:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:48,876 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894947980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:48,876 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:48,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:48,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443270393] [2022-03-03 19:42:48,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:48,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:48,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:48,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:48,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:48,877 INFO L87 Difference]: Start difference. First operand 863 states and 1737 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:50,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:50,252 INFO L93 Difference]: Finished difference Result 1119 states and 2223 transitions. [2022-03-03 19:42:50,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:42:50,252 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:50,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:50,253 INFO L225 Difference]: With dead ends: 1119 [2022-03-03 19:42:50,253 INFO L226 Difference]: Without dead ends: 1070 [2022-03-03 19:42:50,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1577 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=449, Invalid=4807, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:42:50,254 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 127 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1382 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:50,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 547 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1382 Invalid, 0 Unknown, 247 Unchecked, 0.5s Time] [2022-03-03 19:42:50,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1070 states. [2022-03-03 19:42:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1070 to 850. [2022-03-03 19:42:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.0200235571260308) internal successors, (1715), 849 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1715 transitions. [2022-03-03 19:42:50,261 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1715 transitions. Word has length 33 [2022-03-03 19:42:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:50,262 INFO L470 AbstractCegarLoop]: Abstraction has 850 states and 1715 transitions. [2022-03-03 19:42:50,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1715 transitions. [2022-03-03 19:42:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:50,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:50,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:50,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-03 19:42:50,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-03 19:42:50,463 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:50,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:50,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1979273514, now seen corresponding path program 153 times [2022-03-03 19:42:50,463 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:50,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868104491] [2022-03-03 19:42:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:50,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:50,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:50,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:50,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868104491] [2022-03-03 19:42:50,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868104491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:50,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382766870] [2022-03-03 19:42:50,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:42:50,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:50,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:50,736 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:50,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-03 19:42:50,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:42:50,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:51,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:51,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:51,155 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 27 treesize of output 13 [2022-03-03 19:42:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:51,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:51,700 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:51,700 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 42 treesize of output 60 [2022-03-03 19:42:51,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:51,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382766870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:51,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:51,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:51,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112853715] [2022-03-03 19:42:51,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:51,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:51,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:51,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:51,758 INFO L87 Difference]: Start difference. First operand 850 states and 1715 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:53,071 INFO L93 Difference]: Finished difference Result 1134 states and 2262 transitions. [2022-03-03 19:42:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:42:53,071 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:53,072 INFO L225 Difference]: With dead ends: 1134 [2022-03-03 19:42:53,072 INFO L226 Difference]: Without dead ends: 1113 [2022-03-03 19:42:53,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 9 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=486, Invalid=5064, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:42:53,073 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 121 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:53,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 300 Invalid, 1371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1109 Invalid, 0 Unknown, 213 Unchecked, 0.4s Time] [2022-03-03 19:42:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2022-03-03 19:42:53,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 842. [2022-03-03 19:42:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-03-03 19:42:53,081 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-03-03 19:42:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:53,081 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-03-03 19:42:53,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-03-03 19:42:53,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:53,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:53,082 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:53,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2022-03-03 19:42:53,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-03 19:42:53,299 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash -300668212, now seen corresponding path program 154 times [2022-03-03 19:42:53,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:53,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961700378] [2022-03-03 19:42:53,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:53,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:53,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:53,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:53,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961700378] [2022-03-03 19:42:53,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961700378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:53,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414115119] [2022-03-03 19:42:53,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:42:53,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:53,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:53,552 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:53,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-03 19:42:53,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:42:53,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:53,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:42:53,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:53,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:53,955 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 27 treesize of output 13 [2022-03-03 19:42:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:54,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:54,518 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:54,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:42:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:54,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414115119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:54,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:54,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:42:54,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684902459] [2022-03-03 19:42:54,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:54,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:42:54,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:42:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:42:54,565 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:56,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:42:56,320 INFO L93 Difference]: Finished difference Result 1142 states and 2281 transitions. [2022-03-03 19:42:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:42:56,320 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:42:56,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:42:56,321 INFO L225 Difference]: With dead ends: 1142 [2022-03-03 19:42:56,321 INFO L226 Difference]: Without dead ends: 1098 [2022-03-03 19:42:56,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 11 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=539, Invalid=5623, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:42:56,322 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 172 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 2149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:42:56,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 515 Invalid, 2149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1701 Invalid, 0 Unknown, 391 Unchecked, 0.6s Time] [2022-03-03 19:42:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-03-03 19:42:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 843. [2022-03-03 19:42:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 843 states, 842 states have (on average 2.02375296912114) internal successors, (1704), 842 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:56,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 843 states to 843 states and 1704 transitions. [2022-03-03 19:42:56,329 INFO L78 Accepts]: Start accepts. Automaton has 843 states and 1704 transitions. Word has length 33 [2022-03-03 19:42:56,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:42:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 843 states and 1704 transitions. [2022-03-03 19:42:56,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:42:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states and 1704 transitions. [2022-03-03 19:42:56,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:42:56,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:42:56,330 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:42:56,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-03 19:42:56,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:56,538 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:42:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:42:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash -941778802, now seen corresponding path program 155 times [2022-03-03 19:42:56,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:42:56,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135794671] [2022-03-03 19:42:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:42:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:42:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:42:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:56,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:42:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135794671] [2022-03-03 19:42:56,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135794671] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:42:56,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943774828] [2022-03-03 19:42:56,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:42:56,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:42:56,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:42:56,799 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:42:56,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-03 19:42:56,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:42:56,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:42:56,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:42:56,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:42:57,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:42:57,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:42:57,129 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 27 treesize of output 13 [2022-03-03 19:42:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:57,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:42:57,840 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:42:57,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-03-03 19:42:57,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:42:57,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943774828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:42:57,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:42:57,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:42:57,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113759065] [2022-03-03 19:42:57,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:42:57,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:42:57,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:42:57,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:42:57,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1856, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:42:57,892 INFO L87 Difference]: Start difference. First operand 843 states and 1704 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:00,672 INFO L93 Difference]: Finished difference Result 1518 states and 3033 transitions. [2022-03-03 19:43:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:43:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:00,674 INFO L225 Difference]: With dead ends: 1518 [2022-03-03 19:43:00,674 INFO L226 Difference]: Without dead ends: 1486 [2022-03-03 19:43:00,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=980, Invalid=9732, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:43:00,675 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 356 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:00,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 579 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1997 Invalid, 0 Unknown, 356 Unchecked, 0.7s Time] [2022-03-03 19:43:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2022-03-03 19:43:00,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 842. [2022-03-03 19:43:00,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.023781212841855) internal successors, (1702), 841 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:00,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1702 transitions. [2022-03-03 19:43:00,684 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1702 transitions. Word has length 33 [2022-03-03 19:43:00,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:00,684 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1702 transitions. [2022-03-03 19:43:00,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:00,684 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1702 transitions. [2022-03-03 19:43:00,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:00,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:00,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:00,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-03 19:43:00,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:00,885 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:00,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:00,886 INFO L85 PathProgramCache]: Analyzing trace with hash 484463564, now seen corresponding path program 156 times [2022-03-03 19:43:00,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:00,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666701990] [2022-03-03 19:43:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:00,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:01,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:01,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666701990] [2022-03-03 19:43:01,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666701990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:01,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637917492] [2022-03-03 19:43:01,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:43:01,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:01,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:01,138 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:01,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-03 19:43:01,157 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:43:01,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:01,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:43:01,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:01,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:01,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:01,474 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 25 treesize of output 13 [2022-03-03 19:43:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:01,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:02,075 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:02,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:43:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:02,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637917492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:02,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:02,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:02,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781965937] [2022-03-03 19:43:02,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:02,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:02,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:02,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:02,140 INFO L87 Difference]: Start difference. First operand 842 states and 1702 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:05,173 INFO L93 Difference]: Finished difference Result 1471 states and 2936 transitions. [2022-03-03 19:43:05,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:43:05,173 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:05,174 INFO L225 Difference]: With dead ends: 1471 [2022-03-03 19:43:05,174 INFO L226 Difference]: Without dead ends: 1428 [2022-03-03 19:43:05,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3670 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1268, Invalid=10288, Unknown=0, NotChecked=0, Total=11556 [2022-03-03 19:43:05,175 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 260 mSDsluCounter, 789 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:05,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 506 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1878 Invalid, 0 Unknown, 534 Unchecked, 0.7s Time] [2022-03-03 19:43:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-03-03 19:43:05,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 847. [2022-03-03 19:43:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 2.023640661938534) internal successors, (1712), 846 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1712 transitions. [2022-03-03 19:43:05,183 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1712 transitions. Word has length 33 [2022-03-03 19:43:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:05,184 INFO L470 AbstractCegarLoop]: Abstraction has 847 states and 1712 transitions. [2022-03-03 19:43:05,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1712 transitions. [2022-03-03 19:43:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:05,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:05,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:05,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-03 19:43:05,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:05,385 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:05,385 INFO L85 PathProgramCache]: Analyzing trace with hash -430169182, now seen corresponding path program 157 times [2022-03-03 19:43:05,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:05,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812124908] [2022-03-03 19:43:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:05,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:05,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:05,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812124908] [2022-03-03 19:43:05,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812124908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:05,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519344080] [2022-03-03 19:43:05,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:43:05,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:05,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:05,652 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:05,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-03 19:43:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:05,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:05,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:05,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:05,959 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-03-03 19:43:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:06,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:06,584 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:06,584 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 42 treesize of output 60 [2022-03-03 19:43:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:06,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519344080] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:06,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:06,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:06,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688101886] [2022-03-03 19:43:06,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:06,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:06,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:06,630 INFO L87 Difference]: Start difference. First operand 847 states and 1712 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:09,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:09,071 INFO L93 Difference]: Finished difference Result 1328 states and 2640 transitions. [2022-03-03 19:43:09,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:43:09,072 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:09,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:09,073 INFO L225 Difference]: With dead ends: 1328 [2022-03-03 19:43:09,073 INFO L226 Difference]: Without dead ends: 1251 [2022-03-03 19:43:09,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2593 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=926, Invalid=8776, Unknown=0, NotChecked=0, Total=9702 [2022-03-03 19:43:09,074 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 209 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:09,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 526 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 2357 Invalid, 0 Unknown, 108 Unchecked, 0.8s Time] [2022-03-03 19:43:09,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-03-03 19:43:09,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 861. [2022-03-03 19:43:09,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.0232558139534884) internal successors, (1740), 860 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:09,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 1740 transitions. [2022-03-03 19:43:09,082 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 1740 transitions. Word has length 33 [2022-03-03 19:43:09,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:09,082 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 1740 transitions. [2022-03-03 19:43:09,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 1740 transitions. [2022-03-03 19:43:09,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:09,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:09,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:09,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-03 19:43:09,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:09,284 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:09,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:09,284 INFO L85 PathProgramCache]: Analyzing trace with hash -2013605696, now seen corresponding path program 158 times [2022-03-03 19:43:09,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:09,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657316143] [2022-03-03 19:43:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:09,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:09,537 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:09,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657316143] [2022-03-03 19:43:09,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657316143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:09,537 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385834942] [2022-03-03 19:43:09,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:43:09,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:09,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:09,539 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:09,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-03 19:43:09,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:43:09,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:09,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:09,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:09,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:09,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:09,966 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 27 treesize of output 13 [2022-03-03 19:43:10,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:10,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:10,487 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:10,488 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 42 treesize of output 60 [2022-03-03 19:43:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:10,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385834942] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:10,536 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:10,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:10,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034277001] [2022-03-03 19:43:10,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:10,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:10,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:10,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:10,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:10,537 INFO L87 Difference]: Start difference. First operand 861 states and 1740 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:12,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:12,344 INFO L93 Difference]: Finished difference Result 1304 states and 2583 transitions. [2022-03-03 19:43:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:43:12,344 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:12,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:12,345 INFO L225 Difference]: With dead ends: 1304 [2022-03-03 19:43:12,345 INFO L226 Difference]: Without dead ends: 1274 [2022-03-03 19:43:12,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2642 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=634, Invalid=7556, Unknown=0, NotChecked=0, Total=8190 [2022-03-03 19:43:12,346 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 187 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1594 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 2129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 467 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:12,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 480 Invalid, 2129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1594 Invalid, 0 Unknown, 467 Unchecked, 0.6s Time] [2022-03-03 19:43:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-03-03 19:43:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 934. [2022-03-03 19:43:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.0182207931404075) internal successors, (1883), 933 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1883 transitions. [2022-03-03 19:43:12,355 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1883 transitions. Word has length 33 [2022-03-03 19:43:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1883 transitions. [2022-03-03 19:43:12,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1883 transitions. [2022-03-03 19:43:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:12,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:12,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:12,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-03 19:43:12,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:12,556 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1235832742, now seen corresponding path program 159 times [2022-03-03 19:43:12,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:12,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144002300] [2022-03-03 19:43:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:12,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:12,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:12,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:12,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144002300] [2022-03-03 19:43:12,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144002300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:12,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555076570] [2022-03-03 19:43:12,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:43:12,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:12,826 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:12,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-03 19:43:12,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:43:12,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:12,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:13,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:13,231 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 27 treesize of output 13 [2022-03-03 19:43:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:13,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:13,775 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:13,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:43:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:13,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555076570] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:13,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:13,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:13,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031062135] [2022-03-03 19:43:13,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:13,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:13,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:13,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:13,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:13,834 INFO L87 Difference]: Start difference. First operand 934 states and 1883 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:15,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:15,816 INFO L93 Difference]: Finished difference Result 1308 states and 2605 transitions. [2022-03-03 19:43:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:43:15,816 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:15,818 INFO L225 Difference]: With dead ends: 1308 [2022-03-03 19:43:15,818 INFO L226 Difference]: Without dead ends: 1183 [2022-03-03 19:43:15,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2757 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=655, Invalid=7717, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:43:15,818 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 195 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:15,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 471 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1849 Invalid, 0 Unknown, 286 Unchecked, 0.7s Time] [2022-03-03 19:43:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-03-03 19:43:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 875. [2022-03-03 19:43:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.0274599542334095) internal successors, (1772), 874 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1772 transitions. [2022-03-03 19:43:15,826 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1772 transitions. Word has length 33 [2022-03-03 19:43:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:15,826 INFO L470 AbstractCegarLoop]: Abstraction has 875 states and 1772 transitions. [2022-03-03 19:43:15,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1772 transitions. [2022-03-03 19:43:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:15,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:15,827 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:15,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:16,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:16,028 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:16,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:16,028 INFO L85 PathProgramCache]: Analyzing trace with hash -627983106, now seen corresponding path program 160 times [2022-03-03 19:43:16,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:16,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563343031] [2022-03-03 19:43:16,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:16,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:16,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:16,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563343031] [2022-03-03 19:43:16,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563343031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:16,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373444835] [2022-03-03 19:43:16,276 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:43:16,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:16,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:16,277 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:16,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-03 19:43:16,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:43:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:16,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:16,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:16,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:16,748 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 27 treesize of output 13 [2022-03-03 19:43:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:16,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:17,288 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:17,289 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 42 treesize of output 60 [2022-03-03 19:43:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:17,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373444835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:17,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:17,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:17,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553152247] [2022-03-03 19:43:17,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:17,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:17,345 INFO L87 Difference]: Start difference. First operand 875 states and 1772 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:19,909 INFO L93 Difference]: Finished difference Result 1382 states and 2756 transitions. [2022-03-03 19:43:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 19:43:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:19,911 INFO L225 Difference]: With dead ends: 1382 [2022-03-03 19:43:19,911 INFO L226 Difference]: Without dead ends: 1294 [2022-03-03 19:43:19,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 36 SyntacticMatches, 14 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3387 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=808, Invalid=9092, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 19:43:19,912 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 188 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:19,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 540 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2252 Invalid, 0 Unknown, 793 Unchecked, 0.8s Time] [2022-03-03 19:43:19,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1294 states. [2022-03-03 19:43:19,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1294 to 876. [2022-03-03 19:43:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.0274285714285716) internal successors, (1774), 875 states have internal predecessors, (1774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1774 transitions. [2022-03-03 19:43:19,921 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1774 transitions. Word has length 33 [2022-03-03 19:43:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:19,921 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1774 transitions. [2022-03-03 19:43:19,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1774 transitions. [2022-03-03 19:43:19,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:19,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:19,922 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:19,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-03 19:43:20,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-03-03 19:43:20,123 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1269093696, now seen corresponding path program 161 times [2022-03-03 19:43:20,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:20,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265073433] [2022-03-03 19:43:20,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:20,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:20,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:20,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:20,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265073433] [2022-03-03 19:43:20,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265073433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:20,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839512192] [2022-03-03 19:43:20,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:43:20,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:20,381 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:20,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-03 19:43:20,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:43:20,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:20,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:43:20,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:20,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:20,706 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 27 treesize of output 13 [2022-03-03 19:43:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:20,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:21,399 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:21,399 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 49 treesize of output 63 [2022-03-03 19:43:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:21,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839512192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:21,454 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:21,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:43:21,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392943558] [2022-03-03 19:43:21,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:21,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:43:21,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:43:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1859, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:43:21,455 INFO L87 Difference]: Start difference. First operand 876 states and 1774 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:25,870 INFO L93 Difference]: Finished difference Result 1697 states and 3376 transitions. [2022-03-03 19:43:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 19:43:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:25,872 INFO L225 Difference]: With dead ends: 1697 [2022-03-03 19:43:25,872 INFO L226 Difference]: Without dead ends: 1621 [2022-03-03 19:43:25,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6161 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1618, Invalid=16742, Unknown=0, NotChecked=0, Total=18360 [2022-03-03 19:43:25,873 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 312 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2970 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 2970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:25,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 609 Invalid, 3497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 2970 Invalid, 0 Unknown, 352 Unchecked, 1.1s Time] [2022-03-03 19:43:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-03 19:43:25,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 887. [2022-03-03 19:43:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.0316027088036117) internal successors, (1800), 886 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1800 transitions. [2022-03-03 19:43:25,884 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1800 transitions. Word has length 33 [2022-03-03 19:43:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:25,884 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1800 transitions. [2022-03-03 19:43:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:25,884 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1800 transitions. [2022-03-03 19:43:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:25,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:25,885 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:25,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:26,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-03 19:43:26,085 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash 157148670, now seen corresponding path program 162 times [2022-03-03 19:43:26,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:26,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274876824] [2022-03-03 19:43:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:26,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:26,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:26,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274876824] [2022-03-03 19:43:26,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274876824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:26,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806122501] [2022-03-03 19:43:26,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:43:26,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:26,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:26,341 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:26,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-03 19:43:26,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:43:26,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:26,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:43:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:26,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:26,687 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 25 treesize of output 13 [2022-03-03 19:43:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:26,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:27,269 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:27,269 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 42 treesize of output 60 [2022-03-03 19:43:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:27,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806122501] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:27,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:27,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:27,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151021754] [2022-03-03 19:43:27,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:27,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:27,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:27,319 INFO L87 Difference]: Start difference. First operand 887 states and 1800 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:30,261 INFO L93 Difference]: Finished difference Result 1477 states and 2950 transitions. [2022-03-03 19:43:30,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-03 19:43:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:30,263 INFO L225 Difference]: With dead ends: 1477 [2022-03-03 19:43:30,263 INFO L226 Difference]: Without dead ends: 1449 [2022-03-03 19:43:30,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 37 SyntacticMatches, 13 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1231, Invalid=10111, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:43:30,264 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 222 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:30,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 408 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1516 Invalid, 0 Unknown, 387 Unchecked, 0.6s Time] [2022-03-03 19:43:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2022-03-03 19:43:30,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 887. [2022-03-03 19:43:30,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.0316027088036117) internal successors, (1800), 886 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 1800 transitions. [2022-03-03 19:43:30,273 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 1800 transitions. Word has length 33 [2022-03-03 19:43:30,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:30,273 INFO L470 AbstractCegarLoop]: Abstraction has 887 states and 1800 transitions. [2022-03-03 19:43:30,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:30,273 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 1800 transitions. [2022-03-03 19:43:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:30,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:30,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:30,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-03 19:43:30,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-03 19:43:30,490 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:30,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1437769234, now seen corresponding path program 163 times [2022-03-03 19:43:30,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:30,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294719305] [2022-03-03 19:43:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:30,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:30,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:30,741 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294719305] [2022-03-03 19:43:30,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294719305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:30,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538564707] [2022-03-03 19:43:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:43:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:30,742 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:30,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-03 19:43:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:30,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:31,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:31,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:31,148 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 27 treesize of output 13 [2022-03-03 19:43:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:31,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:31,690 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:31,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:43:31,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:31,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538564707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:31,743 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:31,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:31,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522001146] [2022-03-03 19:43:31,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:31,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:31,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:31,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:31,744 INFO L87 Difference]: Start difference. First operand 887 states and 1800 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:33,849 INFO L93 Difference]: Finished difference Result 1299 states and 2591 transitions. [2022-03-03 19:43:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:43:33,850 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:33,851 INFO L225 Difference]: With dead ends: 1299 [2022-03-03 19:43:33,851 INFO L226 Difference]: Without dead ends: 1221 [2022-03-03 19:43:33,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=734, Invalid=8386, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:43:33,852 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 189 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:33,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 397 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1418 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2022-03-03 19:43:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-03-03 19:43:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 903. [2022-03-03 19:43:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0277161862527717) internal successors, (1829), 902 states have internal predecessors, (1829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1829 transitions. [2022-03-03 19:43:33,861 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1829 transitions. Word has length 33 [2022-03-03 19:43:33,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:33,861 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1829 transitions. [2022-03-03 19:43:33,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1829 transitions. [2022-03-03 19:43:33,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:33,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:33,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:33,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:34,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-03 19:43:34,071 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:34,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1706912120, now seen corresponding path program 164 times [2022-03-03 19:43:34,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:34,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085992038] [2022-03-03 19:43:34,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:34,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:34,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:34,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085992038] [2022-03-03 19:43:34,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085992038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:34,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591083] [2022-03-03 19:43:34,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:43:34,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:34,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:34,332 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:34,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-03 19:43:34,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:43:34,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:34,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:34,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:34,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:34,725 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 27 treesize of output 13 [2022-03-03 19:43:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:34,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:35,285 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:35,285 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 42 treesize of output 60 [2022-03-03 19:43:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:35,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:35,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:35,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:35,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70759155] [2022-03-03 19:43:35,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:35,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:35,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:35,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:35,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:35,334 INFO L87 Difference]: Start difference. First operand 903 states and 1829 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:37,673 INFO L93 Difference]: Finished difference Result 1326 states and 2635 transitions. [2022-03-03 19:43:37,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:43:37,673 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:37,674 INFO L225 Difference]: With dead ends: 1326 [2022-03-03 19:43:37,674 INFO L226 Difference]: Without dead ends: 1263 [2022-03-03 19:43:37,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2598 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=674, Invalid=7882, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:43:37,675 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 1013 mSDsCounter, 0 mSdLazyCounter, 2512 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 2512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 594 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:37,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 653 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 2512 Invalid, 0 Unknown, 594 Unchecked, 0.9s Time] [2022-03-03 19:43:37,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2022-03-03 19:43:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 897. [2022-03-03 19:43:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.0301339285714284) internal successors, (1819), 896 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1819 transitions. [2022-03-03 19:43:37,683 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1819 transitions. Word has length 33 [2022-03-03 19:43:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:37,684 INFO L470 AbstractCegarLoop]: Abstraction has 897 states and 1819 transitions. [2022-03-03 19:43:37,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:37,684 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1819 transitions. [2022-03-03 19:43:37,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:37,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:37,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:37,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-03 19:43:37,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-03 19:43:37,893 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:37,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1176800460, now seen corresponding path program 165 times [2022-03-03 19:43:37,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:37,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489225507] [2022-03-03 19:43:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:37,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:38,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:38,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:38,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489225507] [2022-03-03 19:43:38,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489225507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:38,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993803347] [2022-03-03 19:43:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:43:38,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:38,148 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:38,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-03 19:43:38,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:43:38,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:38,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:38,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:38,535 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 27 treesize of output 13 [2022-03-03 19:43:38,698 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:38,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:39,102 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:39,103 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 42 treesize of output 60 [2022-03-03 19:43:39,152 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:39,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993803347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:39,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:39,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:39,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996606040] [2022-03-03 19:43:39,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:39,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:39,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:39,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:39,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:39,153 INFO L87 Difference]: Start difference. First operand 897 states and 1819 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:41,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:41,297 INFO L93 Difference]: Finished difference Result 1298 states and 2587 transitions. [2022-03-03 19:43:41,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:43:41,297 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:41,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:41,298 INFO L225 Difference]: With dead ends: 1298 [2022-03-03 19:43:41,298 INFO L226 Difference]: Without dead ends: 1234 [2022-03-03 19:43:41,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2473 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=695, Invalid=7861, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:43:41,299 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 171 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 580 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:41,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 462 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1695 Invalid, 0 Unknown, 580 Unchecked, 0.6s Time] [2022-03-03 19:43:41,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-03-03 19:43:41,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 893. [2022-03-03 19:43:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.0280269058295963) internal successors, (1809), 892 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1809 transitions. [2022-03-03 19:43:41,308 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1809 transitions. Word has length 33 [2022-03-03 19:43:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:41,308 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1809 transitions. [2022-03-03 19:43:41,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1809 transitions. [2022-03-03 19:43:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:41,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:41,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:41,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-03 19:43:41,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:41,523 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2078879824, now seen corresponding path program 166 times [2022-03-03 19:43:41,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:41,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572419106] [2022-03-03 19:43:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:41,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:41,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:41,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:41,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572419106] [2022-03-03 19:43:41,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572419106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:41,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295228518] [2022-03-03 19:43:41,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:43:41,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:41,783 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:41,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-03 19:43:41,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:43:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:41,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:42,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:42,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:42,116 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 27 treesize of output 13 [2022-03-03 19:43:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:42,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:42,683 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:42,683 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 42 treesize of output 60 [2022-03-03 19:43:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:42,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295228518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:42,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:42,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:42,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581495138] [2022-03-03 19:43:42,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:42,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:42,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:42,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:42,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:42,737 INFO L87 Difference]: Start difference. First operand 893 states and 1809 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:46,192 INFO L93 Difference]: Finished difference Result 1570 states and 3126 transitions. [2022-03-03 19:43:46,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 19:43:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:46,194 INFO L225 Difference]: With dead ends: 1570 [2022-03-03 19:43:46,194 INFO L226 Difference]: Without dead ends: 1466 [2022-03-03 19:43:46,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4895 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1536, Invalid=13716, Unknown=0, NotChecked=0, Total=15252 [2022-03-03 19:43:46,195 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 282 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:46,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 375 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2057 Invalid, 0 Unknown, 222 Unchecked, 0.8s Time] [2022-03-03 19:43:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1466 states. [2022-03-03 19:43:46,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1466 to 898. [2022-03-03 19:43:46,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0267558528428093) internal successors, (1818), 897 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:46,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1818 transitions. [2022-03-03 19:43:46,210 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1818 transitions. Word has length 33 [2022-03-03 19:43:46,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:46,210 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 1818 transitions. [2022-03-03 19:43:46,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:46,210 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1818 transitions. [2022-03-03 19:43:46,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:46,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:46,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:46,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-03 19:43:46,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:46,412 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1076059558, now seen corresponding path program 167 times [2022-03-03 19:43:46,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:46,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898820602] [2022-03-03 19:43:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:46,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:46,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:46,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898820602] [2022-03-03 19:43:46,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898820602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:46,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379301694] [2022-03-03 19:43:46,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:43:46,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:46,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:46,664 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:46,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-03 19:43:46,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:43:46,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:46,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:43:46,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:46,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:46,967 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 27 treesize of output 13 [2022-03-03 19:43:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:47,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:47,697 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:47,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 63 [2022-03-03 19:43:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:47,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379301694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:47,756 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:47,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:43:47,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166669478] [2022-03-03 19:43:47,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:47,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:43:47,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:47,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:43:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1862, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:43:47,759 INFO L87 Difference]: Start difference. First operand 898 states and 1818 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:52,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:52,093 INFO L93 Difference]: Finished difference Result 1643 states and 3255 transitions. [2022-03-03 19:43:52,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-03 19:43:52,093 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:52,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:52,095 INFO L225 Difference]: With dead ends: 1643 [2022-03-03 19:43:52,095 INFO L226 Difference]: Without dead ends: 1513 [2022-03-03 19:43:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5872 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1665, Invalid=16695, Unknown=0, NotChecked=0, Total=18360 [2022-03-03 19:43:52,096 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 355 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 2796 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 3118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 2796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:52,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 444 Invalid, 3118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 2796 Invalid, 0 Unknown, 35 Unchecked, 1.1s Time] [2022-03-03 19:43:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2022-03-03 19:43:52,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 957. [2022-03-03 19:43:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.032426778242678) internal successors, (1943), 956 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1943 transitions. [2022-03-03 19:43:52,106 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1943 transitions. Word has length 33 [2022-03-03 19:43:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:52,106 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 1943 transitions. [2022-03-03 19:43:52,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1943 transitions. [2022-03-03 19:43:52,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:52,107 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:52,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:52,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:52,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-03 19:43:52,308 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:52,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:52,308 INFO L85 PathProgramCache]: Analyzing trace with hash -757484076, now seen corresponding path program 168 times [2022-03-03 19:43:52,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:52,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470449391] [2022-03-03 19:43:52,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:52,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:52,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:52,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470449391] [2022-03-03 19:43:52,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470449391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:52,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082931352] [2022-03-03 19:43:52,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:43:52,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:52,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:52,559 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:52,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-03 19:43:52,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:43:52,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:43:52,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:43:52,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:52,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:52,866 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 25 treesize of output 13 [2022-03-03 19:43:53,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:53,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:53,462 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:53,462 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 42 treesize of output 60 [2022-03-03 19:43:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:53,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082931352] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:53,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:53,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:53,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490282742] [2022-03-03 19:43:53,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:53,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:53,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:53,519 INFO L87 Difference]: Start difference. First operand 957 states and 1943 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:43:57,192 INFO L93 Difference]: Finished difference Result 1620 states and 3221 transitions. [2022-03-03 19:43:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-03 19:43:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:43:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:43:57,194 INFO L225 Difference]: With dead ends: 1620 [2022-03-03 19:43:57,194 INFO L226 Difference]: Without dead ends: 1503 [2022-03-03 19:43:57,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4764 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1406, Invalid=14344, Unknown=0, NotChecked=0, Total=15750 [2022-03-03 19:43:57,195 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 242 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 3361 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 3694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 3361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:43:57,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 643 Invalid, 3694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 3361 Invalid, 0 Unknown, 180 Unchecked, 1.2s Time] [2022-03-03 19:43:57,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1503 states. [2022-03-03 19:43:57,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1503 to 982. [2022-03-03 19:43:57,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 981 states have (on average 2.0336391437308867) internal successors, (1995), 981 states have internal predecessors, (1995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1995 transitions. [2022-03-03 19:43:57,212 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1995 transitions. Word has length 33 [2022-03-03 19:43:57,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:43:57,212 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1995 transitions. [2022-03-03 19:43:57,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:43:57,212 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1995 transitions. [2022-03-03 19:43:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:43:57,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:43:57,213 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:43:57,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-03 19:43:57,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:57,413 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:43:57,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:43:57,413 INFO L85 PathProgramCache]: Analyzing trace with hash 469014850, now seen corresponding path program 169 times [2022-03-03 19:43:57,414 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:43:57,414 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454583667] [2022-03-03 19:43:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:43:57,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:43:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:57,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:43:57,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454583667] [2022-03-03 19:43:57,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454583667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:43:57,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60102162] [2022-03-03 19:43:57,665 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:43:57,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:43:57,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:43:57,666 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:43:57,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-03 19:43:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:43:57,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:43:57,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:43:58,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:43:58,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:43:58,073 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 27 treesize of output 13 [2022-03-03 19:43:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:58,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:43:58,627 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:43:58,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:43:58,683 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:43:58,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60102162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:43:58,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:43:58,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:43:58,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606508441] [2022-03-03 19:43:58,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:43:58,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:43:58,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:43:58,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:43:58,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:43:58,684 INFO L87 Difference]: Start difference. First operand 982 states and 1995 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:01,840 INFO L93 Difference]: Finished difference Result 1688 states and 3361 transitions. [2022-03-03 19:44:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:44:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:01,842 INFO L225 Difference]: With dead ends: 1688 [2022-03-03 19:44:01,842 INFO L226 Difference]: Without dead ends: 1550 [2022-03-03 19:44:01,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 41 SyntacticMatches, 14 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4190 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1119, Invalid=11537, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:44:01,842 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 214 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 2388 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:01,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 485 Invalid, 2980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2388 Invalid, 0 Unknown, 488 Unchecked, 0.9s Time] [2022-03-03 19:44:01,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1550 states. [2022-03-03 19:44:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1550 to 1057. [2022-03-03 19:44:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.034090909090909) internal successors, (2148), 1056 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2148 transitions. [2022-03-03 19:44:01,852 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2148 transitions. Word has length 33 [2022-03-03 19:44:01,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:01,852 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 2148 transitions. [2022-03-03 19:44:01,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:01,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2148 transitions. [2022-03-03 19:44:01,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:01,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:01,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:01,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-03 19:44:02,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:02,067 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -21774050, now seen corresponding path program 170 times [2022-03-03 19:44:02,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:02,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380087447] [2022-03-03 19:44:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:02,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:02,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:02,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:02,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380087447] [2022-03-03 19:44:02,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380087447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:02,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37184572] [2022-03-03 19:44:02,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:02,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:02,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:02,316 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:02,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-03 19:44:02,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:02,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:02,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:02,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:02,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:02,633 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 27 treesize of output 13 [2022-03-03 19:44:02,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:02,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:03,231 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:03,231 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 42 treesize of output 60 [2022-03-03 19:44:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:03,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37184572] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:03,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:03,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:03,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265361292] [2022-03-03 19:44:03,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:03,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:03,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:03,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:03,289 INFO L87 Difference]: Start difference. First operand 1057 states and 2148 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:07,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:07,578 INFO L93 Difference]: Finished difference Result 1804 states and 3584 transitions. [2022-03-03 19:44:07,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-03 19:44:07,578 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:07,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:07,580 INFO L225 Difference]: With dead ends: 1804 [2022-03-03 19:44:07,580 INFO L226 Difference]: Without dead ends: 1674 [2022-03-03 19:44:07,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6527 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1679, Invalid=17781, Unknown=0, NotChecked=0, Total=19460 [2022-03-03 19:44:07,581 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 372 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 4003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 446 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:07,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 833 Invalid, 4003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3362 Invalid, 0 Unknown, 446 Unchecked, 1.2s Time] [2022-03-03 19:44:07,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-03-03 19:44:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1152. [2022-03-03 19:44:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1151 states have (on average 2.0321459600347525) internal successors, (2339), 1151 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 2339 transitions. [2022-03-03 19:44:07,593 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 2339 transitions. Word has length 33 [2022-03-03 19:44:07,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:07,593 INFO L470 AbstractCegarLoop]: Abstraction has 1152 states and 2339 transitions. [2022-03-03 19:44:07,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:07,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 2339 transitions. [2022-03-03 19:44:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:07,594 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:07,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:07,610 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-03 19:44:07,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-03-03 19:44:07,803 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1284545878, now seen corresponding path program 171 times [2022-03-03 19:44:07,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:07,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192545845] [2022-03-03 19:44:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:08,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:08,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192545845] [2022-03-03 19:44:08,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192545845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:08,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082191985] [2022-03-03 19:44:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:08,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:08,057 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:08,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-03 19:44:08,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:44:08,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:08,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:08,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:08,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:08,469 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 27 treesize of output 13 [2022-03-03 19:44:08,600 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:08,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:08,991 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:08,991 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 42 treesize of output 60 [2022-03-03 19:44:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:09,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082191985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:09,034 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:09,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:09,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931539714] [2022-03-03 19:44:09,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:09,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:09,034 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:09,035 INFO L87 Difference]: Start difference. First operand 1152 states and 2339 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:10,970 INFO L93 Difference]: Finished difference Result 1609 states and 3210 transitions. [2022-03-03 19:44:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 19:44:10,970 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:10,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:10,972 INFO L225 Difference]: With dead ends: 1609 [2022-03-03 19:44:10,972 INFO L226 Difference]: Without dead ends: 1580 [2022-03-03 19:44:10,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 39 SyntacticMatches, 11 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2798 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=750, Invalid=7806, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:44:10,972 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 175 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:10,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 555 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1570 Invalid, 0 Unknown, 163 Unchecked, 0.6s Time] [2022-03-03 19:44:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1580 states. [2022-03-03 19:44:10,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1580 to 1230. [2022-03-03 19:44:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.0268510984540278) internal successors, (2491), 1229 states have internal predecessors, (2491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 2491 transitions. [2022-03-03 19:44:10,983 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 2491 transitions. Word has length 33 [2022-03-03 19:44:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:10,983 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 2491 transitions. [2022-03-03 19:44:10,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 2491 transitions. [2022-03-03 19:44:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:10,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:10,984 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:11,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-03 19:44:11,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:11,185 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:11,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:11,185 INFO L85 PathProgramCache]: Analyzing trace with hash 508159906, now seen corresponding path program 172 times [2022-03-03 19:44:11,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:11,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160964886] [2022-03-03 19:44:11,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:11,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:11,439 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:11,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160964886] [2022-03-03 19:44:11,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160964886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:11,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579343903] [2022-03-03 19:44:11,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:11,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:11,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:11,441 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:11,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-03 19:44:11,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:11,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:11,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:11,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:11,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:11,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:11,856 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 27 treesize of output 13 [2022-03-03 19:44:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:11,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:12,377 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:12,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:44:12,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:12,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579343903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:12,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:12,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:12,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242103064] [2022-03-03 19:44:12,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:12,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:12,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:12,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:12,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:12,438 INFO L87 Difference]: Start difference. First operand 1230 states and 2491 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:14,409 INFO L93 Difference]: Finished difference Result 1609 states and 3206 transitions. [2022-03-03 19:44:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:44:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:14,411 INFO L225 Difference]: With dead ends: 1609 [2022-03-03 19:44:14,411 INFO L226 Difference]: Without dead ends: 1540 [2022-03-03 19:44:14,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 12 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3056 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=776, Invalid=8344, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:44:14,412 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 218 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:14,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 480 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1571 Invalid, 0 Unknown, 207 Unchecked, 0.6s Time] [2022-03-03 19:44:14,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2022-03-03 19:44:14,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1229. [2022-03-03 19:44:14,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.022801302931596) internal successors, (2484), 1228 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2484 transitions. [2022-03-03 19:44:14,422 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2484 transitions. Word has length 33 [2022-03-03 19:44:14,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:14,422 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 2484 transitions. [2022-03-03 19:44:14,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:14,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2484 transitions. [2022-03-03 19:44:14,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:14,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:14,423 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:14,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:14,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:14,624 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:14,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:14,624 INFO L85 PathProgramCache]: Analyzing trace with hash 239017020, now seen corresponding path program 173 times [2022-03-03 19:44:14,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:14,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599141027] [2022-03-03 19:44:14,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:14,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:14,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:14,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599141027] [2022-03-03 19:44:14,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599141027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:14,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676567469] [2022-03-03 19:44:14,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:14,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:14,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:14,881 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:14,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-03 19:44:14,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:44:14,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:14,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:44:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:15,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:15,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:15,285 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 25 treesize of output 13 [2022-03-03 19:44:15,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:15,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:15,806 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:15,806 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 42 treesize of output 60 [2022-03-03 19:44:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:15,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676567469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:15,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:15,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:15,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295243089] [2022-03-03 19:44:15,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:15,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:15,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:15,862 INFO L87 Difference]: Start difference. First operand 1229 states and 2484 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:17,853 INFO L93 Difference]: Finished difference Result 1709 states and 3406 transitions. [2022-03-03 19:44:17,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:44:17,854 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:17,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:17,856 INFO L225 Difference]: With dead ends: 1709 [2022-03-03 19:44:17,856 INFO L226 Difference]: Without dead ends: 1577 [2022-03-03 19:44:17,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2681 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=771, Invalid=7785, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:44:17,857 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 230 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:17,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 448 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1757 Invalid, 0 Unknown, 310 Unchecked, 0.7s Time] [2022-03-03 19:44:17,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1577 states. [2022-03-03 19:44:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1577 to 1200. [2022-03-03 19:44:17,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.029190992493745) internal successors, (2433), 1199 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 2433 transitions. [2022-03-03 19:44:17,868 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 2433 transitions. Word has length 33 [2022-03-03 19:44:17,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:17,868 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 2433 transitions. [2022-03-03 19:44:17,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 2433 transitions. [2022-03-03 19:44:17,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:17,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:17,869 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:17,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-03 19:44:18,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:18,070 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:18,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:18,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1624798828, now seen corresponding path program 174 times [2022-03-03 19:44:18,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:18,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265007202] [2022-03-03 19:44:18,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:18,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:18,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:18,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265007202] [2022-03-03 19:44:18,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265007202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:18,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178763107] [2022-03-03 19:44:18,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:18,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:18,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:18,322 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:18,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-03 19:44:18,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:44:18,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:18,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:18,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:18,792 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 25 treesize of output 13 [2022-03-03 19:44:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:18,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:19,402 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:19,402 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 47 treesize of output 63 [2022-03-03 19:44:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:19,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178763107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:19,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:19,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:44:19,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932606768] [2022-03-03 19:44:19,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:19,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:44:19,468 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:44:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1855, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:44:19,469 INFO L87 Difference]: Start difference. First operand 1200 states and 2433 transitions. Second operand has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:22,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:22,752 INFO L93 Difference]: Finished difference Result 1764 states and 3518 transitions. [2022-03-03 19:44:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-03 19:44:22,752 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:22,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:22,754 INFO L225 Difference]: With dead ends: 1764 [2022-03-03 19:44:22,754 INFO L226 Difference]: Without dead ends: 1664 [2022-03-03 19:44:22,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 33 SyntacticMatches, 13 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1122, Invalid=12218, Unknown=0, NotChecked=0, Total=13340 [2022-03-03 19:44:22,755 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 356 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 3407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:22,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 662 Invalid, 3407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2981 Invalid, 0 Unknown, 268 Unchecked, 1.1s Time] [2022-03-03 19:44:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-03-03 19:44:22,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1206. [2022-03-03 19:44:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1206 states, 1205 states have (on average 2.029045643153527) internal successors, (2445), 1205 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:22,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1206 states to 1206 states and 2445 transitions. [2022-03-03 19:44:22,772 INFO L78 Accepts]: Start accepts. Automaton has 1206 states and 2445 transitions. Word has length 33 [2022-03-03 19:44:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:22,773 INFO L470 AbstractCegarLoop]: Abstraction has 1206 states and 2445 transitions. [2022-03-03 19:44:22,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 45 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1206 states and 2445 transitions. [2022-03-03 19:44:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:22,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:22,774 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:22,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-03 19:44:22,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-03 19:44:22,974 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1253520918, now seen corresponding path program 175 times [2022-03-03 19:44:22,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:22,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019708644] [2022-03-03 19:44:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:23,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:23,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019708644] [2022-03-03 19:44:23,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019708644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:23,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569650909] [2022-03-03 19:44:23,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:23,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:23,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:23,217 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:23,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-03 19:44:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:23,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:23,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:23,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:23,615 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 27 treesize of output 13 [2022-03-03 19:44:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:23,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:24,145 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:24,145 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 42 treesize of output 60 [2022-03-03 19:44:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:24,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569650909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:24,192 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:24,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:24,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789138561] [2022-03-03 19:44:24,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:24,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:24,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:24,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:24,192 INFO L87 Difference]: Start difference. First operand 1206 states and 2445 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:26,520 INFO L93 Difference]: Finished difference Result 1801 states and 3617 transitions. [2022-03-03 19:44:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-03 19:44:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:26,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:26,522 INFO L225 Difference]: With dead ends: 1801 [2022-03-03 19:44:26,522 INFO L226 Difference]: Without dead ends: 1725 [2022-03-03 19:44:26,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1015, Invalid=10757, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 19:44:26,523 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 229 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 1429 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:26,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 419 Invalid, 1745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1429 Invalid, 0 Unknown, 205 Unchecked, 0.6s Time] [2022-03-03 19:44:26,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2022-03-03 19:44:26,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1204. [2022-03-03 19:44:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.0290939318370738) internal successors, (2441), 1203 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:26,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 2441 transitions. [2022-03-03 19:44:26,535 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 2441 transitions. Word has length 33 [2022-03-03 19:44:26,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:26,535 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 2441 transitions. [2022-03-03 19:44:26,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 2441 transitions. [2022-03-03 19:44:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:26,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:26,536 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:26,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-03 19:44:26,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:26,737 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash 2029057878, now seen corresponding path program 176 times [2022-03-03 19:44:26,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:26,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174487310] [2022-03-03 19:44:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:26,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:26,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:26,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174487310] [2022-03-03 19:44:26,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174487310] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:26,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41249766] [2022-03-03 19:44:26,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:26,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:26,988 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:26,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-03 19:44:27,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:27,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:27,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:27,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:27,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:27,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:27,328 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 27 treesize of output 13 [2022-03-03 19:44:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:27,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:27,891 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:27,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:44:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:27,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41249766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:27,967 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:27,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:27,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970317465] [2022-03-03 19:44:27,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:27,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:27,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:27,968 INFO L87 Difference]: Start difference. First operand 1204 states and 2441 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:31,714 INFO L93 Difference]: Finished difference Result 1974 states and 3932 transitions. [2022-03-03 19:44:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-03 19:44:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:31,716 INFO L225 Difference]: With dead ends: 1974 [2022-03-03 19:44:31,717 INFO L226 Difference]: Without dead ends: 1835 [2022-03-03 19:44:31,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5706 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1652, Invalid=15378, Unknown=0, NotChecked=0, Total=17030 [2022-03-03 19:44:31,718 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 308 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 770 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:31,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 682 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 2572 Invalid, 0 Unknown, 770 Unchecked, 1.0s Time] [2022-03-03 19:44:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2022-03-03 19:44:31,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1183. [2022-03-03 19:44:31,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.029610829103215) internal successors, (2399), 1182 states have internal predecessors, (2399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2399 transitions. [2022-03-03 19:44:31,730 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2399 transitions. Word has length 33 [2022-03-03 19:44:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:31,730 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 2399 transitions. [2022-03-03 19:44:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2399 transitions. [2022-03-03 19:44:31,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:31,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:31,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:31,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-03 19:44:31,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:31,932 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:31,932 INFO L85 PathProgramCache]: Analyzing trace with hash -839667052, now seen corresponding path program 177 times [2022-03-03 19:44:31,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:31,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936400347] [2022-03-03 19:44:31,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:31,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:32,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:32,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936400347] [2022-03-03 19:44:32,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936400347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:32,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435684882] [2022-03-03 19:44:32,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:44:32,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:32,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:32,182 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:32,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-03 19:44:32,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:44:32,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:44:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:32,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:32,513 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 27 treesize of output 13 [2022-03-03 19:44:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:32,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:33,223 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:33,223 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 49 treesize of output 63 [2022-03-03 19:44:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:33,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435684882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:33,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:33,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:44:33,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094951378] [2022-03-03 19:44:33,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:33,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:44:33,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:33,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:44:33,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:44:33,271 INFO L87 Difference]: Start difference. First operand 1183 states and 2399 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:38,377 INFO L93 Difference]: Finished difference Result 2048 states and 4049 transitions. [2022-03-03 19:44:38,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-03-03 19:44:38,377 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:38,379 INFO L225 Difference]: With dead ends: 2048 [2022-03-03 19:44:38,379 INFO L226 Difference]: Without dead ends: 1950 [2022-03-03 19:44:38,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 36 SyntacticMatches, 9 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8031 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2163, Invalid=20789, Unknown=0, NotChecked=0, Total=22952 [2022-03-03 19:44:38,380 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 396 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 3352 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 4080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 3352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 509 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:38,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 645 Invalid, 4080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 3352 Invalid, 0 Unknown, 509 Unchecked, 1.3s Time] [2022-03-03 19:44:38,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-03-03 19:44:38,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1187. [2022-03-03 19:44:38,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.026981450252951) internal successors, (2404), 1186 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2404 transitions. [2022-03-03 19:44:38,393 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2404 transitions. Word has length 33 [2022-03-03 19:44:38,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:38,393 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2404 transitions. [2022-03-03 19:44:38,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:38,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2404 transitions. [2022-03-03 19:44:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:38,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:38,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:38,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-03 19:44:38,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-03 19:44:38,594 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:38,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1860382340, now seen corresponding path program 178 times [2022-03-03 19:44:38,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:38,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610817692] [2022-03-03 19:44:38,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:38,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:38,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:38,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610817692] [2022-03-03 19:44:38,846 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610817692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:38,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758803551] [2022-03-03 19:44:38,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:44:38,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:38,847 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:38,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-03 19:44:38,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:44:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:38,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:38,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:39,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:39,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:39,259 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 27 treesize of output 13 [2022-03-03 19:44:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:39,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:39,807 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:39,807 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 42 treesize of output 60 [2022-03-03 19:44:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:39,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758803551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:39,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:39,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:39,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630833862] [2022-03-03 19:44:39,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:39,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:39,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:39,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1546, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:39,862 INFO L87 Difference]: Start difference. First operand 1187 states and 2404 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:42,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:42,475 INFO L93 Difference]: Finished difference Result 1796 states and 3592 transitions. [2022-03-03 19:44:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 19:44:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:42,477 INFO L225 Difference]: With dead ends: 1796 [2022-03-03 19:44:42,477 INFO L226 Difference]: Without dead ends: 1672 [2022-03-03 19:44:42,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 13 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3421 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=937, Invalid=9569, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:44:42,478 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 220 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 1966 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 588 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:42,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 585 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1966 Invalid, 0 Unknown, 588 Unchecked, 0.7s Time] [2022-03-03 19:44:42,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2022-03-03 19:44:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1193. [2022-03-03 19:44:42,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.0268456375838926) internal successors, (2416), 1192 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 2416 transitions. [2022-03-03 19:44:42,496 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 2416 transitions. Word has length 33 [2022-03-03 19:44:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:42,496 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 2416 transitions. [2022-03-03 19:44:42,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 2416 transitions. [2022-03-03 19:44:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:42,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:42,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:42,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-03 19:44:42,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:42,698 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1219271750, now seen corresponding path program 179 times [2022-03-03 19:44:42,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:42,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107881840] [2022-03-03 19:44:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:42,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:42,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107881840] [2022-03-03 19:44:42,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107881840] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:42,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419183556] [2022-03-03 19:44:42,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:44:42,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:42,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:42,944 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:42,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-03 19:44:42,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:44:42,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:44:42,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:43,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:43,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:43,278 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 27 treesize of output 13 [2022-03-03 19:44:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:43,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:43,987 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:43,988 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 49 treesize of output 63 [2022-03-03 19:44:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:44,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419183556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:44,044 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:44,044 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-03 19:44:44,044 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648832571] [2022-03-03 19:44:44,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:44,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-03 19:44:44,044 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:44,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-03 19:44:44,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1854, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:44:44,044 INFO L87 Difference]: Start difference. First operand 1193 states and 2416 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:47,207 INFO L93 Difference]: Finished difference Result 1777 states and 3563 transitions. [2022-03-03 19:44:47,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-03 19:44:47,207 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:47,209 INFO L225 Difference]: With dead ends: 1777 [2022-03-03 19:44:47,209 INFO L226 Difference]: Without dead ends: 1713 [2022-03-03 19:44:47,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4212 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1268, Invalid=12072, Unknown=0, NotChecked=0, Total=13340 [2022-03-03 19:44:47,210 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 247 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 2800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:47,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 549 Invalid, 2800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2407 Invalid, 0 Unknown, 225 Unchecked, 0.9s Time] [2022-03-03 19:44:47,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-03-03 19:44:47,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1198. [2022-03-03 19:44:47,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.026733500417711) internal successors, (2426), 1197 states have internal predecessors, (2426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 2426 transitions. [2022-03-03 19:44:47,222 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 2426 transitions. Word has length 33 [2022-03-03 19:44:47,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:47,222 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 2426 transitions. [2022-03-03 19:44:47,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 45 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 2426 transitions. [2022-03-03 19:44:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:47,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:47,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:47,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-03 19:44:47,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:47,423 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:47,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:47,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1781082480, now seen corresponding path program 180 times [2022-03-03 19:44:47,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:47,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718926791] [2022-03-03 19:44:47,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:47,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:47,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:47,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718926791] [2022-03-03 19:44:47,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718926791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:47,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844862249] [2022-03-03 19:44:47,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:44:47,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:47,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:47,673 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:47,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-03 19:44:47,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:44:47,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:44:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:48,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:48,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:48,015 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 25 treesize of output 13 [2022-03-03 19:44:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:48,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:48,589 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:48,589 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 42 treesize of output 60 [2022-03-03 19:44:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:48,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844862249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:48,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:48,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:48,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191143159] [2022-03-03 19:44:48,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:48,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:48,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1536, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:48,641 INFO L87 Difference]: Start difference. First operand 1198 states and 2426 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:51,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:51,444 INFO L93 Difference]: Finished difference Result 1769 states and 3565 transitions. [2022-03-03 19:44:51,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 19:44:51,444 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:51,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:51,446 INFO L225 Difference]: With dead ends: 1769 [2022-03-03 19:44:51,446 INFO L226 Difference]: Without dead ends: 1737 [2022-03-03 19:44:51,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3482 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1159, Invalid=10183, Unknown=0, NotChecked=0, Total=11342 [2022-03-03 19:44:51,447 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 217 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 619 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:51,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 492 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1930 Invalid, 0 Unknown, 619 Unchecked, 0.7s Time] [2022-03-03 19:44:51,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1737 states. [2022-03-03 19:44:51,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1737 to 1193. [2022-03-03 19:44:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.0268456375838926) internal successors, (2416), 1192 states have internal predecessors, (2416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 2416 transitions. [2022-03-03 19:44:51,459 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 2416 transitions. Word has length 33 [2022-03-03 19:44:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 1193 states and 2416 transitions. [2022-03-03 19:44:51,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 2416 transitions. [2022-03-03 19:44:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:51,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:51,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:51,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-03 19:44:51,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:51,661 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:51,661 INFO L85 PathProgramCache]: Analyzing trace with hash 79243836, now seen corresponding path program 181 times [2022-03-03 19:44:51,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:51,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743738497] [2022-03-03 19:44:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:51,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:51,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:51,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743738497] [2022-03-03 19:44:51,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743738497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:51,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655337304] [2022-03-03 19:44:51,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:44:51,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:51,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:51,922 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:51,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-03 19:44:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:44:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:52,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:52,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:52,231 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 27 treesize of output 13 [2022-03-03 19:44:52,430 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:52,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:52,821 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:52,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 60 [2022-03-03 19:44:52,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:52,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655337304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:52,868 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:52,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:52,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715073323] [2022-03-03 19:44:52,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:52,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:52,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:52,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:52,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1537, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:52,869 INFO L87 Difference]: Start difference. First operand 1193 states and 2416 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:55,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:55,270 INFO L93 Difference]: Finished difference Result 1679 states and 3360 transitions. [2022-03-03 19:44:55,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:44:55,270 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:55,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:55,272 INFO L225 Difference]: With dead ends: 1679 [2022-03-03 19:44:55,272 INFO L226 Difference]: Without dead ends: 1615 [2022-03-03 19:44:55,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3169 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1087, Invalid=9419, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:44:55,272 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 212 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1889 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:55,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 385 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1889 Invalid, 0 Unknown, 120 Unchecked, 0.7s Time] [2022-03-03 19:44:55,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2022-03-03 19:44:55,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1187. [2022-03-03 19:44:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.026981450252951) internal successors, (2404), 1186 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:55,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 2404 transitions. [2022-03-03 19:44:55,284 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 2404 transitions. Word has length 33 [2022-03-03 19:44:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:55,284 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 2404 transitions. [2022-03-03 19:44:55,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 2404 transitions. [2022-03-03 19:44:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:55,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:55,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:55,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-03 19:44:55,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:55,486 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:44:55,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:44:55,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1754299798, now seen corresponding path program 182 times [2022-03-03 19:44:55,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:44:55,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234224179] [2022-03-03 19:44:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:44:55,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:44:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:44:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:55,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:44:55,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234224179] [2022-03-03 19:44:55,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234224179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:44:55,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248945266] [2022-03-03 19:44:55,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:44:55,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:44:55,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:44:55,737 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:44:55,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-03 19:44:55,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:44:55,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:44:55,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:44:55,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:44:56,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:44:56,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:44:56,049 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 27 treesize of output 13 [2022-03-03 19:44:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:56,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:44:56,649 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:44:56,649 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 42 treesize of output 60 [2022-03-03 19:44:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:44:56,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248945266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:44:56,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:44:56,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:44:56,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657591171] [2022-03-03 19:44:56,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:44:56,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:44:56,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:44:56,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:44:56,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:44:56,704 INFO L87 Difference]: Start difference. First operand 1187 states and 2404 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:44:59,805 INFO L93 Difference]: Finished difference Result 1726 states and 3436 transitions. [2022-03-03 19:44:59,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-03 19:44:59,806 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:44:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:44:59,807 INFO L225 Difference]: With dead ends: 1726 [2022-03-03 19:44:59,807 INFO L226 Difference]: Without dead ends: 1621 [2022-03-03 19:44:59,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4143 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1334, Invalid=12472, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:44:59,808 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 316 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 2524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:44:59,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 467 Invalid, 2524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2297 Invalid, 0 Unknown, 68 Unchecked, 0.9s Time] [2022-03-03 19:44:59,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-03 19:44:59,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1209. [2022-03-03 19:44:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1208 states have (on average 2.0264900662251657) internal successors, (2448), 1208 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2448 transitions. [2022-03-03 19:44:59,820 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2448 transitions. Word has length 33 [2022-03-03 19:44:59,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:44:59,820 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2448 transitions. [2022-03-03 19:44:59,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:44:59,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2448 transitions. [2022-03-03 19:44:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:44:59,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:44:59,821 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:44:59,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-03 19:45:00,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:00,022 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:00,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:00,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1258121136, now seen corresponding path program 183 times [2022-03-03 19:45:00,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:00,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621512943] [2022-03-03 19:45:00,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:00,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:00,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:00,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:00,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:00,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621512943] [2022-03-03 19:45:00,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621512943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:00,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864229214] [2022-03-03 19:45:00,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:00,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:00,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:00,269 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:00,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-03 19:45:00,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:45:00,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:00,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:00,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:00,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:00,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:00,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2022-03-03 19:45:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:00,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:01,205 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:01,206 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 42 treesize of output 60 [2022-03-03 19:45:01,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:01,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864229214] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:01,256 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:01,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-03-03 19:45:01,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054617379] [2022-03-03 19:45:01,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:01,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:45:01,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:45:01,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:45:01,256 INFO L87 Difference]: Start difference. First operand 1209 states and 2448 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:03,719 INFO L93 Difference]: Finished difference Result 1732 states and 3449 transitions. [2022-03-03 19:45:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:45:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:03,721 INFO L225 Difference]: With dead ends: 1732 [2022-03-03 19:45:03,721 INFO L226 Difference]: Without dead ends: 1612 [2022-03-03 19:45:03,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 43 SyntacticMatches, 14 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=896, Invalid=8416, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:45:03,722 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 273 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 2083 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 352 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:03,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 471 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2083 Invalid, 0 Unknown, 352 Unchecked, 0.8s Time] [2022-03-03 19:45:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2022-03-03 19:45:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1229. [2022-03-03 19:45:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1229 states, 1228 states have (on average 2.02442996742671) internal successors, (2486), 1228 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:03,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1229 states to 1229 states and 2486 transitions. [2022-03-03 19:45:03,734 INFO L78 Accepts]: Start accepts. Automaton has 1229 states and 2486 transitions. Word has length 33 [2022-03-03 19:45:03,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:03,734 INFO L470 AbstractCegarLoop]: Abstraction has 1229 states and 2486 transitions. [2022-03-03 19:45:03,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:03,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1229 states and 2486 transitions. [2022-03-03 19:45:03,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:03,735 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:03,735 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:03,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-03 19:45:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-03 19:45:03,935 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:03,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1899231726, now seen corresponding path program 184 times [2022-03-03 19:45:03,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:03,936 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31571690] [2022-03-03 19:45:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:04,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:04,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31571690] [2022-03-03 19:45:04,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31571690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:04,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985857202] [2022-03-03 19:45:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:04,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:04,191 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:04,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-03 19:45:04,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:04,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:04,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:04,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:04,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:04,510 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 27 treesize of output 13 [2022-03-03 19:45:04,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:04,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:05,069 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:05,070 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 42 treesize of output 60 [2022-03-03 19:45:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:05,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985857202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:05,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:05,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 40 [2022-03-03 19:45:05,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768013014] [2022-03-03 19:45:05,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:05,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:45:05,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:45:05,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1468, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:45:05,121 INFO L87 Difference]: Start difference. First operand 1229 states and 2486 transitions. Second operand has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:07,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:07,696 INFO L93 Difference]: Finished difference Result 1886 states and 3776 transitions. [2022-03-03 19:45:07,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-03 19:45:07,697 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:07,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:07,699 INFO L225 Difference]: With dead ends: 1886 [2022-03-03 19:45:07,699 INFO L226 Difference]: Without dead ends: 1822 [2022-03-03 19:45:07,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1064, Invalid=9238, Unknown=0, NotChecked=0, Total=10302 [2022-03-03 19:45:07,700 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 264 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:07,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 432 Invalid, 2429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1999 Invalid, 0 Unknown, 309 Unchecked, 0.7s Time] [2022-03-03 19:45:07,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1822 states. [2022-03-03 19:45:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1822 to 1244. [2022-03-03 19:45:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.0265486725663715) internal successors, (2519), 1243 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 2519 transitions. [2022-03-03 19:45:07,712 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 2519 transitions. Word has length 33 [2022-03-03 19:45:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:07,712 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 2519 transitions. [2022-03-03 19:45:07,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.951219512195122) internal successors, (80), 40 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 2519 transitions. [2022-03-03 19:45:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:07,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:07,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:07,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-03 19:45:07,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-03 19:45:07,914 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:07,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -472989360, now seen corresponding path program 185 times [2022-03-03 19:45:07,914 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:07,914 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550856906] [2022-03-03 19:45:07,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:07,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:07,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:08,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:08,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550856906] [2022-03-03 19:45:08,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550856906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:08,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352776069] [2022-03-03 19:45:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:08,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:08,151 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:08,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-03 19:45:08,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:08,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:08,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-03 19:45:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:08,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:08,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:08,468 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 27 treesize of output 13 [2022-03-03 19:45:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:08,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:09,164 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:09,164 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 49 treesize of output 63 [2022-03-03 19:45:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:09,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352776069] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:09,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:09,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-03-03 19:45:09,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311795004] [2022-03-03 19:45:09,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:09,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:45:09,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:45:09,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1771, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:45:09,220 INFO L87 Difference]: Start difference. First operand 1244 states and 2519 transitions. Second operand has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:14,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:14,077 INFO L93 Difference]: Finished difference Result 2122 states and 4200 transitions. [2022-03-03 19:45:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-03 19:45:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:14,079 INFO L225 Difference]: With dead ends: 2122 [2022-03-03 19:45:14,079 INFO L226 Difference]: Without dead ends: 1989 [2022-03-03 19:45:14,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 34 SyntacticMatches, 9 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7265 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2152, Invalid=19604, Unknown=0, NotChecked=0, Total=21756 [2022-03-03 19:45:14,081 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 468 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 3106 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:14,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 610 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3106 Invalid, 0 Unknown, 397 Unchecked, 1.2s Time] [2022-03-03 19:45:14,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1989 states. [2022-03-03 19:45:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1989 to 1238. [2022-03-03 19:45:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.0234438156831045) internal successors, (2503), 1237 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 2503 transitions. [2022-03-03 19:45:14,093 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 2503 transitions. Word has length 33 [2022-03-03 19:45:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 2503 transitions. [2022-03-03 19:45:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.8) internal successors, (81), 44 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 2503 transitions. [2022-03-03 19:45:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:14,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:14,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:14,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:14,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-03 19:45:14,296 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:14,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1301364348, now seen corresponding path program 186 times [2022-03-03 19:45:14,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:14,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471192098] [2022-03-03 19:45:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:14,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:14,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471192098] [2022-03-03 19:45:14,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471192098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:14,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751382116] [2022-03-03 19:45:14,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:14,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:14,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:14,539 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:14,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-03 19:45:14,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:45:14,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:15,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:15,015 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 25 treesize of output 13 [2022-03-03 19:45:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:15,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:15,618 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:15,618 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 47 treesize of output 63 [2022-03-03 19:45:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:15,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751382116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:15,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:15,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-03-03 19:45:15,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74960761] [2022-03-03 19:45:15,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:15,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-03 19:45:15,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-03 19:45:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1760, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:45:15,667 INFO L87 Difference]: Start difference. First operand 1238 states and 2503 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:18,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:18,078 INFO L93 Difference]: Finished difference Result 2004 states and 3972 transitions. [2022-03-03 19:45:18,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-03 19:45:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:18,080 INFO L225 Difference]: With dead ends: 2004 [2022-03-03 19:45:18,080 INFO L226 Difference]: Without dead ends: 1896 [2022-03-03 19:45:18,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 38 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3425 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=946, Invalid=9560, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:45:18,081 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 301 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 2133 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:18,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 406 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2133 Invalid, 0 Unknown, 389 Unchecked, 0.8s Time] [2022-03-03 19:45:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2022-03-03 19:45:18,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1286. [2022-03-03 19:45:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 1285 states have (on average 2.0155642023346303) internal successors, (2590), 1285 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:18,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 2590 transitions. [2022-03-03 19:45:18,093 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 2590 transitions. Word has length 33 [2022-03-03 19:45:18,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:18,093 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 2590 transitions. [2022-03-03 19:45:18,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:18,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 2590 transitions. [2022-03-03 19:45:18,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:18,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:18,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:18,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:18,299 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:18,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:18,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1044174664, now seen corresponding path program 187 times [2022-03-03 19:45:18,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:18,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658290489] [2022-03-03 19:45:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:18,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:18,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658290489] [2022-03-03 19:45:18,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658290489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:18,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552994987] [2022-03-03 19:45:18,553 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:18,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:18,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:18,556 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:18,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-03 19:45:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:18,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:18,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:18,895 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:45:18,895 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 29 treesize of output 13 [2022-03-03 19:45:19,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:19,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:19,408 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:19,408 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 44 treesize of output 62 [2022-03-03 19:45:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:19,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552994987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:19,478 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:19,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:19,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562273466] [2022-03-03 19:45:19,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:19,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:19,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:19,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:19,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:19,478 INFO L87 Difference]: Start difference. First operand 1286 states and 2590 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:20,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:20,768 INFO L93 Difference]: Finished difference Result 1760 states and 3517 transitions. [2022-03-03 19:45:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:45:20,769 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:20,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:20,771 INFO L225 Difference]: With dead ends: 1760 [2022-03-03 19:45:20,771 INFO L226 Difference]: Without dead ends: 1712 [2022-03-03 19:45:20,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=455, Invalid=5095, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:45:20,772 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 204 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:20,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 430 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:45:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2022-03-03 19:45:20,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1292. [2022-03-03 19:45:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.017815646785438) internal successors, (2605), 1291 states have internal predecessors, (2605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:20,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 2605 transitions. [2022-03-03 19:45:20,785 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 2605 transitions. Word has length 33 [2022-03-03 19:45:20,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:20,785 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 2605 transitions. [2022-03-03 19:45:20,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 2605 transitions. [2022-03-03 19:45:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:20,786 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:20,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:20,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-03 19:45:20,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:20,987 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:20,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1971420918, now seen corresponding path program 188 times [2022-03-03 19:45:20,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:20,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683196526] [2022-03-03 19:45:20,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:20,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:20,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:21,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:21,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683196526] [2022-03-03 19:45:21,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683196526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:21,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032298006] [2022-03-03 19:45:21,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:21,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:21,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:21,236 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:21,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-03 19:45:21,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:21,578 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:45:21,579 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 29 treesize of output 13 [2022-03-03 19:45:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:21,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:22,088 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:22,089 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 44 treesize of output 62 [2022-03-03 19:45:22,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:22,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032298006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:22,145 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:22,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:22,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667305093] [2022-03-03 19:45:22,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:22,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:22,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:22,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:22,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1560, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:22,146 INFO L87 Difference]: Start difference. First operand 1292 states and 2605 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:23,983 INFO L93 Difference]: Finished difference Result 1826 states and 3642 transitions. [2022-03-03 19:45:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:45:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:23,985 INFO L225 Difference]: With dead ends: 1826 [2022-03-03 19:45:23,985 INFO L226 Difference]: Without dead ends: 1778 [2022-03-03 19:45:23,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=577, Invalid=6229, Unknown=0, NotChecked=0, Total=6806 [2022-03-03 19:45:23,986 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 191 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 2179 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 2244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:23,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 560 Invalid, 2244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:45:23,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1778 states. [2022-03-03 19:45:23,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1778 to 1293. [2022-03-03 19:45:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1292 states have (on average 2.0178018575851393) internal successors, (2607), 1292 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 2607 transitions. [2022-03-03 19:45:23,998 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 2607 transitions. Word has length 33 [2022-03-03 19:45:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:23,998 INFO L470 AbstractCegarLoop]: Abstraction has 1293 states and 2607 transitions. [2022-03-03 19:45:23,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 2607 transitions. [2022-03-03 19:45:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:23,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:23,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:24,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-03 19:45:24,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:24,199 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:24,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:24,200 INFO L85 PathProgramCache]: Analyzing trace with hash -585798328, now seen corresponding path program 189 times [2022-03-03 19:45:24,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:24,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10835818] [2022-03-03 19:45:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:24,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:24,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10835818] [2022-03-03 19:45:24,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10835818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:24,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36607556] [2022-03-03 19:45:24,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:24,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:24,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:24,476 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:24,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-03 19:45:24,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:45:24,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:45:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:24,816 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:24,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:24,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:24,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:25,346 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:25,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-03-03 19:45:25,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:25,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36607556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:25,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:25,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:25,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211504189] [2022-03-03 19:45:25,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:25,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:25,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:25,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:25,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1557, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:25,417 INFO L87 Difference]: Start difference. First operand 1293 states and 2607 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:27,789 INFO L93 Difference]: Finished difference Result 2066 states and 4115 transitions. [2022-03-03 19:45:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:45:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:27,792 INFO L225 Difference]: With dead ends: 2066 [2022-03-03 19:45:27,792 INFO L226 Difference]: Without dead ends: 2018 [2022-03-03 19:45:27,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=768, Invalid=7604, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:45:27,792 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 244 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 2623 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:27,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 805 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2623 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:45:27,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2022-03-03 19:45:27,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1294. [2022-03-03 19:45:27,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.017788089713844) internal successors, (2609), 1293 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2609 transitions. [2022-03-03 19:45:27,806 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2609 transitions. Word has length 33 [2022-03-03 19:45:27,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:27,806 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2609 transitions. [2022-03-03 19:45:27,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2609 transitions. [2022-03-03 19:45:27,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:27,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:27,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:27,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:28,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-03 19:45:28,008 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:28,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1226908918, now seen corresponding path program 190 times [2022-03-03 19:45:28,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:28,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943941356] [2022-03-03 19:45:28,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:28,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943941356] [2022-03-03 19:45:28,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943941356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:28,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91455176] [2022-03-03 19:45:28,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:28,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:28,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:28,255 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:28,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-03 19:45:28,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:28,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:28,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:28,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:28,541 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:28,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:29,111 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:29,112 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 44 treesize of output 62 [2022-03-03 19:45:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91455176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:29,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:29,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:29,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596288838] [2022-03-03 19:45:29,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:29,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:29,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:29,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:29,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:29,172 INFO L87 Difference]: Start difference. First operand 1294 states and 2609 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:31,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:31,691 INFO L93 Difference]: Finished difference Result 1996 states and 3980 transitions. [2022-03-03 19:45:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:45:31,691 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:31,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:31,694 INFO L225 Difference]: With dead ends: 1996 [2022-03-03 19:45:31,694 INFO L226 Difference]: Without dead ends: 1964 [2022-03-03 19:45:31,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=892, Invalid=8228, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:45:31,695 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 245 mSDsluCounter, 957 mSDsCounter, 0 mSdLazyCounter, 2293 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 626 Invalid, 2401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2293 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:45:31,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2022-03-03 19:45:31,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1294. [2022-03-03 19:45:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1293 states have (on average 2.017788089713844) internal successors, (2609), 1293 states have internal predecessors, (2609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2609 transitions. [2022-03-03 19:45:31,708 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2609 transitions. Word has length 33 [2022-03-03 19:45:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:31,708 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2609 transitions. [2022-03-03 19:45:31,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2609 transitions. [2022-03-03 19:45:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:31,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:31,710 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:31,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-03 19:45:31,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:31,910 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:31,910 INFO L85 PathProgramCache]: Analyzing trace with hash 199333448, now seen corresponding path program 191 times [2022-03-03 19:45:31,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:31,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386673510] [2022-03-03 19:45:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:31,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:32,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:32,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386673510] [2022-03-03 19:45:32,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386673510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:32,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021312030] [2022-03-03 19:45:32,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:32,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:32,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:32,163 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:32,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-03 19:45:32,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:32,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:32,184 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:45:32,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:32,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:32,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:32,509 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 27 treesize of output 13 [2022-03-03 19:45:32,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:32,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:33,299 INFO L353 Elim1Store]: treesize reduction 8, result has 78.4 percent of original size [2022-03-03 19:45:33,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 57 [2022-03-03 19:45:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:33,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021312030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:33,436 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:33,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 48 [2022-03-03 19:45:33,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947253932] [2022-03-03 19:45:33,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:33,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-03 19:45:33,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:33,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-03 19:45:33,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=2072, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:45:33,436 INFO L87 Difference]: Start difference. First operand 1294 states and 2609 transitions. Second operand has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:39,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:39,722 INFO L93 Difference]: Finished difference Result 2365 states and 4672 transitions. [2022-03-03 19:45:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-03 19:45:39,722 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:39,725 INFO L225 Difference]: With dead ends: 2365 [2022-03-03 19:45:39,725 INFO L226 Difference]: Without dead ends: 2222 [2022-03-03 19:45:39,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 35 SyntacticMatches, 9 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9432 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2867, Invalid=24855, Unknown=0, NotChecked=0, Total=27722 [2022-03-03 19:45:39,726 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 494 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 4252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 922 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:39,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [494 Valid, 742 Invalid, 4252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 3095 Invalid, 0 Unknown, 922 Unchecked, 1.2s Time] [2022-03-03 19:45:39,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2022-03-03 19:45:39,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1308. [2022-03-03 19:45:39,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0153022188217293) internal successors, (2634), 1307 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:39,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2634 transitions. [2022-03-03 19:45:39,748 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2634 transitions. Word has length 33 [2022-03-03 19:45:39,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:39,748 INFO L470 AbstractCegarLoop]: Abstraction has 1308 states and 2634 transitions. [2022-03-03 19:45:39,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7755102040816326) internal successors, (87), 48 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:39,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2634 transitions. [2022-03-03 19:45:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:39,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:39,749 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:39,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-03 19:45:39,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:39,950 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:39,950 INFO L85 PathProgramCache]: Analyzing trace with hash 476250482, now seen corresponding path program 192 times [2022-03-03 19:45:39,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:39,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538385903] [2022-03-03 19:45:39,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:39,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:40,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:40,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538385903] [2022-03-03 19:45:40,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538385903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:40,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127693357] [2022-03-03 19:45:40,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:40,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:40,193 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:40,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-03 19:45:40,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:45:40,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:40,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:45:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:40,491 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:40,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:40,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:41,054 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:41,054 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 44 treesize of output 62 [2022-03-03 19:45:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127693357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:41,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:41,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:41,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650375511] [2022-03-03 19:45:41,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:41,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:41,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:41,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:41,117 INFO L87 Difference]: Start difference. First operand 1308 states and 2634 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:43,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:43,635 INFO L93 Difference]: Finished difference Result 1954 states and 3914 transitions. [2022-03-03 19:45:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 19:45:43,636 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:43,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:43,638 INFO L225 Difference]: With dead ends: 1954 [2022-03-03 19:45:43,638 INFO L226 Difference]: Without dead ends: 1910 [2022-03-03 19:45:43,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=999, Invalid=8507, Unknown=0, NotChecked=0, Total=9506 [2022-03-03 19:45:43,639 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 243 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 2015 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 2131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:43,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 474 Invalid, 2131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2015 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:45:43,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-03-03 19:45:43,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1306. [2022-03-03 19:45:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1305 states have (on average 2.0153256704980844) internal successors, (2630), 1305 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:43,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2630 transitions. [2022-03-03 19:45:43,651 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2630 transitions. Word has length 33 [2022-03-03 19:45:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 1306 states and 2630 transitions. [2022-03-03 19:45:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:43,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2630 transitions. [2022-03-03 19:45:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:43,653 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:43,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:43,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-03 19:45:43,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:43,853 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:43,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:43,853 INFO L85 PathProgramCache]: Analyzing trace with hash -438382264, now seen corresponding path program 193 times [2022-03-03 19:45:43,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:43,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395475308] [2022-03-03 19:45:43,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:43,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:44,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:44,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395475308] [2022-03-03 19:45:44,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395475308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:44,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250082804] [2022-03-03 19:45:44,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:44,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:44,095 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-03 19:45:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:44,365 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:44,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:44,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:44,953 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:44,954 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 44 treesize of output 62 [2022-03-03 19:45:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:45,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250082804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:45,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:45,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:45,008 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515419054] [2022-03-03 19:45:45,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:45,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:45,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:45,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:45,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1553, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:45,009 INFO L87 Difference]: Start difference. First operand 1306 states and 2630 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:46,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:46,505 INFO L93 Difference]: Finished difference Result 1832 states and 3678 transitions. [2022-03-03 19:45:46,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:45:46,506 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:46,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:46,508 INFO L225 Difference]: With dead ends: 1832 [2022-03-03 19:45:46,508 INFO L226 Difference]: Without dead ends: 1804 [2022-03-03 19:45:46,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1465 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=546, Invalid=5306, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:45:46,508 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:46,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 471 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:45:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1804 states. [2022-03-03 19:45:46,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1804 to 1298. [2022-03-03 19:45:46,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.015420200462606) internal successors, (2614), 1297 states have internal predecessors, (2614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2614 transitions. [2022-03-03 19:45:46,521 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2614 transitions. Word has length 33 [2022-03-03 19:45:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:46,521 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 2614 transitions. [2022-03-03 19:45:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2614 transitions. [2022-03-03 19:45:46,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:46,522 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:46,522 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:46,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:46,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:46,722 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:46,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:46,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2038241542, now seen corresponding path program 194 times [2022-03-03 19:45:46,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:46,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143086919] [2022-03-03 19:45:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:46,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:46,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143086919] [2022-03-03 19:45:46,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143086919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:46,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156403014] [2022-03-03 19:45:46,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:46,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:46,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:46,971 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:46,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-03 19:45:46,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:46,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:46,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:46,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:47,326 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:45:47,327 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 29 treesize of output 13 [2022-03-03 19:45:47,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:47,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:47,839 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:47,839 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 44 treesize of output 62 [2022-03-03 19:45:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:47,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156403014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:47,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:47,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:47,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921475095] [2022-03-03 19:45:47,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:47,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:47,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1551, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:47,895 INFO L87 Difference]: Start difference. First operand 1298 states and 2614 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:49,988 INFO L93 Difference]: Finished difference Result 1795 states and 3575 transitions. [2022-03-03 19:45:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:45:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:49,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:49,990 INFO L225 Difference]: With dead ends: 1795 [2022-03-03 19:45:49,991 INFO L226 Difference]: Without dead ends: 1699 [2022-03-03 19:45:49,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=697, Invalid=7313, Unknown=0, NotChecked=0, Total=8010 [2022-03-03 19:45:49,991 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 199 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:49,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 531 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:45:49,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-03-03 19:45:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1310. [2022-03-03 19:45:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 2.0168067226890756) internal successors, (2640), 1309 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 2640 transitions. [2022-03-03 19:45:50,003 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 2640 transitions. Word has length 33 [2022-03-03 19:45:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:50,003 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 2640 transitions. [2022-03-03 19:45:50,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 2640 transitions. [2022-03-03 19:45:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:50,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:50,005 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:50,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:50,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-03 19:45:50,205 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash -871103164, now seen corresponding path program 195 times [2022-03-03 19:45:50,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:50,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989384373] [2022-03-03 19:45:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:50,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:50,451 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:50,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989384373] [2022-03-03 19:45:50,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989384373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:50,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332785122] [2022-03-03 19:45:50,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:50,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:50,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:50,452 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:50,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-03 19:45:50,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:45:50,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:50,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:50,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:50,815 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:50,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:50,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:50,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:51,330 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:51,330 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 44 treesize of output 62 [2022-03-03 19:45:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:51,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332785122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:51,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:51,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:51,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812962701] [2022-03-03 19:45:51,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:51,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:51,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:51,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:51,380 INFO L87 Difference]: Start difference. First operand 1310 states and 2640 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:54,725 INFO L93 Difference]: Finished difference Result 1955 states and 3889 transitions. [2022-03-03 19:45:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:45:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:54,727 INFO L225 Difference]: With dead ends: 1955 [2022-03-03 19:45:54,727 INFO L226 Difference]: Without dead ends: 1818 [2022-03-03 19:45:54,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1138, Invalid=11518, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:45:54,728 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 272 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 3038 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:54,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 686 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3038 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:45:54,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-03-03 19:45:54,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1309. [2022-03-03 19:45:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 2.014525993883792) internal successors, (2635), 1308 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2635 transitions. [2022-03-03 19:45:54,740 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2635 transitions. Word has length 33 [2022-03-03 19:45:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:54,741 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 2635 transitions. [2022-03-03 19:45:54,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2635 transitions. [2022-03-03 19:45:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:54,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:54,742 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:54,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-03 19:45:54,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-03 19:45:54,942 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1512213754, now seen corresponding path program 196 times [2022-03-03 19:45:54,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:54,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485505534] [2022-03-03 19:45:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:55,183 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:55,183 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485505534] [2022-03-03 19:45:55,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485505534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:55,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832907559] [2022-03-03 19:45:55,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:55,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:55,185 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:55,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-03 19:45:55,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:55,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:45:55,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:55,478 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:45:55,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:45:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:55,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:56,033 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:56,033 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 44 treesize of output 62 [2022-03-03 19:45:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:56,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832907559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:56,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:56,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:45:56,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470065259] [2022-03-03 19:45:56,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:56,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:45:56,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:56,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:45:56,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:56,093 INFO L87 Difference]: Start difference. First operand 1309 states and 2635 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:59,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:59,334 INFO L93 Difference]: Finished difference Result 1964 states and 3913 transitions. [2022-03-03 19:45:59,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-03 19:45:59,335 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:45:59,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:59,337 INFO L225 Difference]: With dead ends: 1964 [2022-03-03 19:45:59,337 INFO L226 Difference]: Without dead ends: 1875 [2022-03-03 19:45:59,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4470 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1479, Invalid=12563, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:45:59,338 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 274 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:59,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 497 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:45:59,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-03-03 19:45:59,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1302. [2022-03-03 19:45:59,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 2.0146041506533434) internal successors, (2621), 1301 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2621 transitions. [2022-03-03 19:45:59,351 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2621 transitions. Word has length 33 [2022-03-03 19:45:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:59,351 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 2621 transitions. [2022-03-03 19:45:59,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2621 transitions. [2022-03-03 19:45:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:45:59,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:59,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:59,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-03 19:45:59,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-03 19:45:59,553 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:59,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1000604134, now seen corresponding path program 197 times [2022-03-03 19:45:59,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:59,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568977089] [2022-03-03 19:45:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:59,802 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:59,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:59,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568977089] [2022-03-03 19:45:59,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568977089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:59,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913888581] [2022-03-03 19:45:59,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:59,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:59,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:59,804 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:59,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-03 19:45:59,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:59,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:59,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:45:59,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:00,086 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:46:00,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:46:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:00,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:00,671 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:46:00,672 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 44 treesize of output 62 [2022-03-03 19:46:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:00,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913888581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:00,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:00,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:46:00,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241377550] [2022-03-03 19:46:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:00,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:46:00,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:46:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:46:00,741 INFO L87 Difference]: Start difference. First operand 1302 states and 2621 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:03,599 INFO L93 Difference]: Finished difference Result 1848 states and 3673 transitions. [2022-03-03 19:46:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:46:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:46:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:03,601 INFO L225 Difference]: With dead ends: 1848 [2022-03-03 19:46:03,601 INFO L226 Difference]: Without dead ends: 1764 [2022-03-03 19:46:03,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1048, Invalid=9458, Unknown=0, NotChecked=0, Total=10506 [2022-03-03 19:46:03,602 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 225 mSDsluCounter, 976 mSDsCounter, 0 mSdLazyCounter, 3035 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:03,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 616 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3035 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:46:03,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2022-03-03 19:46:03,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1322. [2022-03-03 19:46:03,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1321 states have (on average 2.0143830431491296) internal successors, (2661), 1321 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 2661 transitions. [2022-03-03 19:46:03,614 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 2661 transitions. Word has length 33 [2022-03-03 19:46:03,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:03,614 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 2661 transitions. [2022-03-03 19:46:03,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 2661 transitions. [2022-03-03 19:46:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:46:03,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:03,615 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:03,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:03,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-03 19:46:03,816 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:03,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1710926648, now seen corresponding path program 198 times [2022-03-03 19:46:03,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:03,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100205723] [2022-03-03 19:46:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:03,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:04,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:04,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100205723] [2022-03-03 19:46:04,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100205723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:04,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895833629] [2022-03-03 19:46:04,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:04,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:04,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:04,064 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:04,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-03 19:46:04,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:46:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:04,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-03 19:46:04,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:04,425 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:46:04,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2022-03-03 19:46:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:04,932 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:46:04,932 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 44 treesize of output 62 [2022-03-03 19:46:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895833629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:04,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:04,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:46:04,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880643043] [2022-03-03 19:46:04,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:04,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:46:04,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:46:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1548, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:46:04,984 INFO L87 Difference]: Start difference. First operand 1322 states and 2661 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:07,644 INFO L93 Difference]: Finished difference Result 2051 states and 4084 transitions. [2022-03-03 19:46:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:46:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:46:07,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:07,647 INFO L225 Difference]: With dead ends: 2051 [2022-03-03 19:46:07,647 INFO L226 Difference]: Without dead ends: 1923 [2022-03-03 19:46:07,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4008 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=939, Invalid=11493, Unknown=0, NotChecked=0, Total=12432 [2022-03-03 19:46:07,648 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 2488 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:07,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 479 Invalid, 2581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2488 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:46:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2022-03-03 19:46:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1447. [2022-03-03 19:46:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1447 states, 1446 states have (on average 2.024204702627939) internal successors, (2927), 1446 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1447 states to 1447 states and 2927 transitions. [2022-03-03 19:46:07,663 INFO L78 Accepts]: Start accepts. Automaton has 1447 states and 2927 transitions. Word has length 33 [2022-03-03 19:46:07,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:07,663 INFO L470 AbstractCegarLoop]: Abstraction has 1447 states and 2927 transitions. [2022-03-03 19:46:07,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1447 states and 2927 transitions. [2022-03-03 19:46:07,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:46:07,664 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:07,664 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:07,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:07,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:07,865 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:07,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:07,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1198418058, now seen corresponding path program 199 times [2022-03-03 19:46:07,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:07,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020267991] [2022-03-03 19:46:07,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:07,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:07,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:08,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:08,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020267991] [2022-03-03 19:46:08,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020267991] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:08,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076378747] [2022-03-03 19:46:08,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:08,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:08,111 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:08,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-03 19:46:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:46:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:08,454 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:46:08,454 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 29 treesize of output 13 [2022-03-03 19:46:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:08,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:08,955 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:46:08,956 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 44 treesize of output 62 [2022-03-03 19:46:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:09,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076378747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:09,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:09,019 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:46:09,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790551398] [2022-03-03 19:46:09,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:09,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:46:09,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:46:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1549, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:46:09,020 INFO L87 Difference]: Start difference. First operand 1447 states and 2927 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:14,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:14,048 INFO L93 Difference]: Finished difference Result 2354 states and 4685 transitions. [2022-03-03 19:46:14,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-03 19:46:14,048 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 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 33 [2022-03-03 19:46:14,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:14,050 INFO L225 Difference]: With dead ends: 2354 [2022-03-03 19:46:14,050 INFO L226 Difference]: Without dead ends: 2116 [2022-03-03 19:46:14,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8108 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1851, Invalid=21405, Unknown=0, NotChecked=0, Total=23256 [2022-03-03 19:46:14,052 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 330 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 4583 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 4785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:14,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 892 Invalid, 4785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4583 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-03 19:46:14,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2022-03-03 19:46:14,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1497. [2022-03-03 19:46:14,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.016042780748663) internal successors, (3016), 1496 states have internal predecessors, (3016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3016 transitions. [2022-03-03 19:46:14,067 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3016 transitions. Word has length 33 [2022-03-03 19:46:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:14,068 INFO L470 AbstractCegarLoop]: Abstraction has 1497 states and 3016 transitions. [2022-03-03 19:46:14,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3016 transitions. [2022-03-03 19:46:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-03 19:46:14,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:14,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:14,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:14,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-03 19:46:14,270 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1839528648, now seen corresponding path program 200 times [2022-03-03 19:46:14,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:14,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899947299] [2022-03-03 19:46:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:14,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:14,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899947299] [2022-03-03 19:46:14,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899947299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:14,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186315064] [2022-03-03 19:46:14,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:14,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:14,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:14,518 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:14,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-03 19:46:14,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:14,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:14,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:46:14,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:14,809 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-03 19:46:14,809 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 29 treesize of output 13 [2022-03-03 19:46:14,978 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:14,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:15,347 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:46:15,347 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 44 treesize of output 62 [2022-03-03 19:46:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:15,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186315064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:15,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:15,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 41 [2022-03-03 19:46:15,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521114704] [2022-03-03 19:46:15,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:15,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-03 19:46:15,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-03 19:46:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:46:15,405 INFO L87 Difference]: Start difference. First operand 1497 states and 3016 transitions. Second operand has 42 states, 42 states have (on average 1.9047619047619047) internal successors, (80), 41 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-03 19:46:19,541 WARN L244 SmtUtils]: Removed 6 from assertion stack [2022-03-03 19:46:19,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-03 19:46:19,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6334 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1851, Invalid=16781, Unknown=0, NotChecked=0, Total=18632 [2022-03-03 19:46:19,542 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 263 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 2681 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 2948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 2681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:19,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 347 Invalid, 2948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 2681 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-03 19:46:19,543 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 19:46:19,551 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 [2022-03-03 19:46:19,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:19,575 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 19:46:19,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-03-03 19:46:19,744 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1497states) and FLOYD_HOARE automaton (currently 105 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 6ms.. [2022-03-03 19:46:19,745 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 19:46:19,745 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 19:46:19,747 INFO L732 BasicCegarLoop]: Path program histogram: [200, 5, 1] [2022-03-03 19:46:19,749 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 19:46:19,749 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 19:46:19,750 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 07:46:19 BasicIcfg [2022-03-03 19:46:19,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 19:46:19,750 INFO L158 Benchmark]: Toolchain (without parser) took 751491.60ms. Allocated memory was 175.1MB in the beginning and 293.6MB in the end (delta: 118.5MB). Free memory was 140.4MB in the beginning and 227.9MB in the end (delta: -87.4MB). Peak memory consumption was 31.6MB. Max. memory is 8.0GB. [2022-03-03 19:46:19,750 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 175.1MB. Free memory is still 141.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:46:19,750 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.64ms. Allocated memory is still 175.1MB. Free memory was 140.4MB in the beginning and 138.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:46:19,750 INFO L158 Benchmark]: Boogie Preprocessor took 14.28ms. Allocated memory is still 175.1MB. Free memory was 138.9MB in the beginning and 138.0MB in the end (delta: 947.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 19:46:19,750 INFO L158 Benchmark]: RCFGBuilder took 206.67ms. Allocated memory is still 175.1MB. Free memory was 137.9MB in the beginning and 128.6MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 19:46:19,751 INFO L158 Benchmark]: TraceAbstraction took 751246.53ms. Allocated memory was 175.1MB in the beginning and 293.6MB in the end (delta: 118.5MB). Free memory was 128.1MB in the beginning and 227.9MB in the end (delta: -99.7MB). Peak memory consumption was 19.0MB. Max. memory is 8.0GB. [2022-03-03 19:46:19,751 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 0.14ms. Allocated memory is still 175.1MB. Free memory is still 141.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.64ms. Allocated memory is still 175.1MB. Free memory was 140.4MB in the beginning and 138.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.28ms. Allocated memory is still 175.1MB. Free memory was 138.9MB in the beginning and 138.0MB in the end (delta: 947.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 206.67ms. Allocated memory is still 175.1MB. Free memory was 137.9MB in the beginning and 128.6MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 751246.53ms. Allocated memory was 175.1MB in the beginning and 293.6MB in the end (delta: 118.5MB). Free memory was 128.1MB in the beginning and 227.9MB in the end (delta: -99.7MB). Peak memory consumption was 19.0MB. 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: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1497states) and FLOYD_HOARE automaton (currently 105 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 6ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1497states) and FLOYD_HOARE automaton (currently 105 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 6ms.. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1497states) and FLOYD_HOARE automaton (currently 105 states, 42 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 20 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 751.1s, OverallIterations: 206, TraceHistogramMax: 3, PathProgramHistogramMax: 200, EmptinessCheckTime: 0.2s, AutomataDifference: 465.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47063 SdHoareTripleChecker+Valid, 134.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47063 mSDsluCounter, 104991 SdHoareTripleChecker+Invalid, 113.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 63358 IncrementalHoareTripleChecker+Unchecked, 164804 mSDsCounter, 20141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 365881 IncrementalHoareTripleChecker+Invalid, 449380 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20141 mSolverCounterUnsat, 7173 mSDtfsCounter, 365881 mSolverCounterSat, 0.9s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27783 GetRequests, 7624 SyntacticMatches, 1789 SemanticMatches, 18369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583411 ImplicationChecksByTransitivity, 451.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1497occurred in iteration=205, InterpolantAutomatonStates: 13435, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 205 MinimizatonAttempts, 81892 StatesRemovedByMinimization, 203 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 236.3s InterpolantComputationTime, 13120 NumberOfCodeBlocks, 13120 NumberOfCodeBlocksAsserted, 645 NumberOfCheckSat, 19027 ConstructedInterpolants, 1375 QuantifiedInterpolants, 312024 SizeOfPredicates, 2357 NumberOfNonLiveVariables, 14460 ConjunctsInSsa, 6540 ConjunctsInUnsatCore, 613 InterpolantComputations, 3 PerfectInterpolantSequences, 57/11266 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