/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-MCRwithDepranks-BasicCegarLoop.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-10 03:39:06,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-10 03:39:06,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-10 03:39:06,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-10 03:39:06,885 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-10 03:39:06,916 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-10 03:39:06,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-10 03:39:06,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-10 03:39:06,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-10 03:39:06,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-10 03:39:06,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-10 03:39:06,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-10 03:39:06,918 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-10 03:39:06,918 INFO L138 SettingsManager]: * Use SBE=true [2022-02-10 03:39:06,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-10 03:39:06,918 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-10 03:39:06,918 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-10 03:39:06,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-10 03:39:06,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-10 03:39:06,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-10 03:39:06,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-10 03:39:06,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-10 03:39:06,922 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-10 03:39:06,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-10 03:39:06,922 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-10 03:39:06,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-10 03:39:06,922 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-10 03:39:06,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-10 03:39:06,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-10 03:39:06,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-10 03:39:06,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:39:06,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-10 03:39:06,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-10 03:39:06,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-10 03:39:06,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-10 03:39:06,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-10 03:39:06,926 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-10 03:39:06,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-10 03:39:06,926 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-10 03:39:06,926 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-10 03:39:07,168 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-10 03:39:07,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-10 03:39:07,198 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-10 03:39:07,199 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-10 03:39:07,200 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-10 03:39:07,201 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2022-02-10 03:39:07,201 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2022-02-10 03:39:07,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-10 03:39:07,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-10 03:39:07,227 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-10 03:39:07,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-10 03:39:07,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-10 03:39:07,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,244 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,250 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-10 03:39:07,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-10 03:39:07,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-10 03:39:07,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-10 03:39:07,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-10 03:39:07,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-10 03:39:07,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-10 03:39:07,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-10 03:39:07,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-10 03:39:07,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/1) ... [2022-02-10 03:39:07,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-10 03:39:07,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:07,309 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) [2022-02-10 03:39:07,316 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 [2022-02-10 03:39:07,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-10 03:39:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-10 03:39:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-10 03:39:07,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-10 03:39:07,347 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-10 03:39:07,347 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-10 03:39:07,347 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-10 03:39:07,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-10 03:39:07,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-10 03:39:07,349 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-10 03:39:07,396 INFO L234 CfgBuilder]: Building ICFG [2022-02-10 03:39:07,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-10 03:39:07,537 INFO L275 CfgBuilder]: Performing block encoding [2022-02-10 03:39:07,549 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-10 03:39:07,549 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-10 03:39:07,551 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:39:07 BoogieIcfgContainer [2022-02-10 03:39:07,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-10 03:39:07,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-10 03:39:07,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-10 03:39:07,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-10 03:39:07,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.02 03:39:07" (1/2) ... [2022-02-10 03:39:07,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94bdb00 and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.02 03:39:07, skipping insertion in model container [2022-02-10 03:39:07,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.02 03:39:07" (2/2) ... [2022-02-10 03:39:07,557 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2022-02-10 03:39:07,561 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-10 03:39:07,562 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-10 03:39:07,562 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-10 03:39:07,562 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-10 03:39:07,589 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-02-10 03:39:07,633 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-10 03:39:07,639 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 [2022-02-10 03:39:07,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-10 03:39:07,647 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 28 transitions, 72 flow [2022-02-10 03:39:07,677 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 63 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:12,212 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 223473 transitions and produced 112297 states. [2022-02-10 03:39:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 112297 states, 85139 states have (on average 1.8943962226476703) internal successors, (161287), 112296 states have internal predecessors, (161287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:12,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-10 03:39:12,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:12,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:12,983 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:12,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1160028785, now seen corresponding path program 1 times [2022-02-10 03:39:12,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:13,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351121789] [2022-02-10 03:39:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:13,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:13,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:13,143 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351121789] [2022-02-10 03:39:13,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351121789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:13,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:39:13,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:39:13,145 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149259836] [2022-02-10 03:39:13,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:13,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:39:13,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:13,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:39:13,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:39:13,814 INFO L87 Difference]: Start difference. First operand has 112297 states, 85139 states have (on average 1.8943962226476703) internal successors, (161287), 112296 states have internal predecessors, (161287), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:15,620 INFO L93 Difference]: Finished difference Result 112033 states and 161023 transitions. [2022-02-10 03:39:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:39:15,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-10 03:39:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:16,272 INFO L225 Difference]: With dead ends: 112033 [2022-02-10 03:39:16,273 INFO L226 Difference]: Without dead ends: 78800 [2022-02-10 03:39:16,275 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 [2022-02-10 03:39:16,278 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 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 [2022-02-10 03:39:16,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:39:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78800 states. [2022-02-10 03:39:17,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78800 to 55. [2022-02-10 03:39:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 54 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2022-02-10 03:39:17,529 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 83 transitions. Word has length 14 [2022-02-10 03:39:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:17,530 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 83 transitions. [2022-02-10 03:39:17,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 83 transitions. [2022-02-10 03:39:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-10 03:39:17,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:17,534 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:17,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-10 03:39:17,534 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash -316006220, now seen corresponding path program 1 times [2022-02-10 03:39:17,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:17,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498530774] [2022-02-10 03:39:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:17,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:17,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:17,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498530774] [2022-02-10 03:39:17,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498530774] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:17,643 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:39:17,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:39:17,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116998598] [2022-02-10 03:39:17,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:17,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:39:17,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:17,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:39:17,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:39:17,646 INFO L87 Difference]: Start difference. First operand 55 states and 83 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:17,689 INFO L93 Difference]: Finished difference Result 67 states and 101 transitions. [2022-02-10 03:39:17,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:39:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-02-10 03:39:17,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:17,691 INFO L225 Difference]: With dead ends: 67 [2022-02-10 03:39:17,691 INFO L226 Difference]: Without dead ends: 63 [2022-02-10 03:39:17,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-10 03:39:17,693 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 7 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:17,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:39:17,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-10 03:39:17,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-10 03:39:17,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.564516129032258) internal successors, (97), 62 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 97 transitions. [2022-02-10 03:39:17,702 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 97 transitions. Word has length 18 [2022-02-10 03:39:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:17,702 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 97 transitions. [2022-02-10 03:39:17,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 97 transitions. [2022-02-10 03:39:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-10 03:39:17,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:17,704 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, 1] [2022-02-10 03:39:17,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-10 03:39:17,704 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:17,704 INFO L85 PathProgramCache]: Analyzing trace with hash 151362758, now seen corresponding path program 1 times [2022-02-10 03:39:17,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:17,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471493800] [2022-02-10 03:39:17,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:17,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:17,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:17,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:17,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471493800] [2022-02-10 03:39:17,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471493800] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:17,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151448356] [2022-02-10 03:39:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:17,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:17,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:17,936 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) [2022-02-10 03:39:17,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-10 03:39:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:17,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2022-02-10 03:39:17,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:18,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-02-10 03:39:18,262 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 [2022-02-10 03:39:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:18,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:18,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:18,373 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 15 treesize of output 19 [2022-02-10 03:39:18,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:18,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:18,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151448356] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:18,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:18,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2022-02-10 03:39:18,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292378042] [2022-02-10 03:39:18,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:18,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-10 03:39:18,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:18,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-10 03:39:18,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-02-10 03:39:18,473 INFO L87 Difference]: Start difference. First operand 63 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:18,590 INFO L93 Difference]: Finished difference Result 125 states and 198 transitions. [2022-02-10 03:39:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-10 03:39:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-02-10 03:39:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:18,591 INFO L225 Difference]: With dead ends: 125 [2022-02-10 03:39:18,591 INFO L226 Difference]: Without dead ends: 115 [2022-02-10 03:39:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-02-10 03:39:18,593 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 66 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 97 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:39:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-10 03:39:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2022-02-10 03:39:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.5326086956521738) internal successors, (141), 92 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 141 transitions. [2022-02-10 03:39:18,600 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 141 transitions. Word has length 23 [2022-02-10 03:39:18,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:18,600 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 141 transitions. [2022-02-10 03:39:18,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:18,601 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 141 transitions. [2022-02-10 03:39:18,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-10 03:39:18,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:18,602 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, 1] [2022-02-10 03:39:18,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:18,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:18,826 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:18,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:18,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2001999735, now seen corresponding path program 2 times [2022-02-10 03:39:18,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:18,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195300840] [2022-02-10 03:39:18,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:18,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:18,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:18,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195300840] [2022-02-10 03:39:18,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195300840] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:18,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441274886] [2022-02-10 03:39:18,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:39:18,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:18,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:18,886 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) [2022-02-10 03:39:18,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-10 03:39:18,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:39:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-10 03:39:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:18,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:19,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441274886] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:19,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:19,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-02-10 03:39:19,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851061786] [2022-02-10 03:39:19,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:19,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-10 03:39:19,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-10 03:39:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-10 03:39:19,061 INFO L87 Difference]: Start difference. First operand 93 states and 141 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:19,142 INFO L93 Difference]: Finished difference Result 217 states and 311 transitions. [2022-02-10 03:39:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-10 03:39:19,142 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-02-10 03:39:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:19,143 INFO L225 Difference]: With dead ends: 217 [2022-02-10 03:39:19,143 INFO L226 Difference]: Without dead ends: 208 [2022-02-10 03:39:19,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-02-10 03:39:19,148 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:19,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 81 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-10 03:39:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-10 03:39:19,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 186. [2022-02-10 03:39:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5135135135135136) internal successors, (280), 185 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:19,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2022-02-10 03:39:19,165 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 27 [2022-02-10 03:39:19,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:19,166 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2022-02-10 03:39:19,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:19,166 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2022-02-10 03:39:19,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:19,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:19,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:19,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:19,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-10 03:39:19,381 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:19,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:19,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1394991287, now seen corresponding path program 3 times [2022-02-10 03:39:19,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:19,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533079182] [2022-02-10 03:39:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:19,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:19,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:19,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:19,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:19,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533079182] [2022-02-10 03:39:19,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533079182] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:19,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139423423] [2022-02-10 03:39:19,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:19,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:19,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:19,791 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) [2022-02-10 03:39:19,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-10 03:39:19,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-10 03:39:19,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:19,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:20,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:20,066 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 27 [2022-02-10 03:39:20,314 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:20,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-02-10 03:39:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:20,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:21,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:21,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 45 [2022-02-10 03:39:21,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:21,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139423423] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:21,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:21,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-10 03:39:21,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700351896] [2022-02-10 03:39:21,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:39:21,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:21,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:39:21,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:21,904 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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) [2022-02-10 03:39:23,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:23,146 INFO L93 Difference]: Finished difference Result 369 states and 563 transitions. [2022-02-10 03:39:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:39:23,146 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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 32 [2022-02-10 03:39:23,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:23,147 INFO L225 Difference]: With dead ends: 369 [2022-02-10 03:39:23,147 INFO L226 Difference]: Without dead ends: 351 [2022-02-10 03:39:23,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=2857, Unknown=0, NotChecked=0, Total=3422 [2022-02-10 03:39:23,149 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 142 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:23,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 376 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 348 Invalid, 0 Unknown, 305 Unchecked, 0.3s Time] [2022-02-10 03:39:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-02-10 03:39:23,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 244. [2022-02-10 03:39:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 1.5884773662551441) internal successors, (386), 243 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 386 transitions. [2022-02-10 03:39:23,155 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 386 transitions. Word has length 32 [2022-02-10 03:39:23,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:23,155 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 386 transitions. [2022-02-10 03:39:23,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 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) [2022-02-10 03:39:23,155 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 386 transitions. [2022-02-10 03:39:23,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:23,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:23,156 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:23,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:23,371 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 [2022-02-10 03:39:23,372 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:23,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:23,372 INFO L85 PathProgramCache]: Analyzing trace with hash 27455057, now seen corresponding path program 4 times [2022-02-10 03:39:23,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:23,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716773316] [2022-02-10 03:39:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:23,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:23,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:23,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716773316] [2022-02-10 03:39:23,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716773316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:23,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457938984] [2022-02-10 03:39:23,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:23,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:23,669 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) [2022-02-10 03:39:23,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-10 03:39:23,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:23,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:23,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:23,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:23,993 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:23,994 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 27 [2022-02-10 03:39:24,160 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-10 03:39:24,160 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 10 [2022-02-10 03:39:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:24,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:24,474 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:24,474 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 34 treesize of output 56 [2022-02-10 03:39:24,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:24,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457938984] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:24,693 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:24,693 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-10 03:39:24,693 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873440863] [2022-02-10 03:39:24,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:24,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:39:24,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:24,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:39:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:39:24,694 INFO L87 Difference]: Start difference. First operand 244 states and 386 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:25,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:25,184 INFO L93 Difference]: Finished difference Result 457 states and 707 transitions. [2022-02-10 03:39:25,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-10 03:39:25,184 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-10 03:39:25,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:25,185 INFO L225 Difference]: With dead ends: 457 [2022-02-10 03:39:25,186 INFO L226 Difference]: Without dead ends: 447 [2022-02-10 03:39:25,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:39:25,187 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 148 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:25,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 276 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 556 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-02-10 03:39:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-02-10 03:39:25,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 230. [2022-02-10 03:39:25,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.5502183406113537) internal successors, (355), 229 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 355 transitions. [2022-02-10 03:39:25,192 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 355 transitions. Word has length 32 [2022-02-10 03:39:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:25,192 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 355 transitions. [2022-02-10 03:39:25,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 355 transitions. [2022-02-10 03:39:25,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:25,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:25,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:25,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:25,409 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 [2022-02-10 03:39:25,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:25,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2096069043, now seen corresponding path program 5 times [2022-02-10 03:39:25,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:25,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685375664] [2022-02-10 03:39:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:25,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:39:25,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:25,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685375664] [2022-02-10 03:39:25,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685375664] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:25,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324809172] [2022-02-10 03:39:25,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:25,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:25,680 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) [2022-02-10 03:39:25,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-10 03:39:25,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-10 03:39:25,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:25,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:25,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:26,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:26,094 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 24 treesize of output 24 [2022-02-10 03:39:26,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:26,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:26,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:26,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 10 [2022-02-10 03:39:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:26,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:26,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:26,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:26,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-02-10 03:39:26,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:26,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324809172] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:26,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:26,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-02-10 03:39:26,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44478767] [2022-02-10 03:39:26,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:26,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-10 03:39:26,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:26,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-10 03:39:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:39:26,913 INFO L87 Difference]: Start difference. First operand 230 states and 355 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:27,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:27,306 INFO L93 Difference]: Finished difference Result 424 states and 660 transitions. [2022-02-10 03:39:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-10 03:39:27,306 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-10 03:39:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:27,307 INFO L225 Difference]: With dead ends: 424 [2022-02-10 03:39:27,307 INFO L226 Difference]: Without dead ends: 409 [2022-02-10 03:39:27,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=353, Invalid=1453, Unknown=0, NotChecked=0, Total=1806 [2022-02-10 03:39:27,309 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:27,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 100 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 238 Invalid, 0 Unknown, 204 Unchecked, 0.1s Time] [2022-02-10 03:39:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-10 03:39:27,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 256. [2022-02-10 03:39:27,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.588235294117647) internal successors, (405), 255 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:27,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 405 transitions. [2022-02-10 03:39:27,314 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 405 transitions. Word has length 32 [2022-02-10 03:39:27,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:27,314 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 405 transitions. [2022-02-10 03:39:27,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:27,315 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 405 transitions. [2022-02-10 03:39:27,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:27,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:27,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:27,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:27,527 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 [2022-02-10 03:39:27,528 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:27,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:27,528 INFO L85 PathProgramCache]: Analyzing trace with hash -845481489, now seen corresponding path program 6 times [2022-02-10 03:39:27,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:27,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758370737] [2022-02-10 03:39:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:27,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:27,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:27,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:27,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758370737] [2022-02-10 03:39:27,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758370737] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:27,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033289905] [2022-02-10 03:39:27,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:39:27,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:27,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:27,786 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) [2022-02-10 03:39:27,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-10 03:39:27,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-10 03:39:27,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:27,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:27,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:28,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:28,093 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 27 [2022-02-10 03:39:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:28,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:28,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 10 [2022-02-10 03:39:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:28,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:28,646 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:28,646 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 35 treesize of output 57 [2022-02-10 03:39:28,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:28,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:28,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033289905] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:28,785 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:28,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 29 [2022-02-10 03:39:28,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275031364] [2022-02-10 03:39:28,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:28,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-10 03:39:28,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:28,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-10 03:39:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:39:28,786 INFO L87 Difference]: Start difference. First operand 256 states and 405 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:29,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:29,135 INFO L93 Difference]: Finished difference Result 338 states and 516 transitions. [2022-02-10 03:39:29,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-10 03:39:29,135 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-10 03:39:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:29,136 INFO L225 Difference]: With dead ends: 338 [2022-02-10 03:39:29,136 INFO L226 Difference]: Without dead ends: 325 [2022-02-10 03:39:29,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=257, Invalid=1225, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:39:29,137 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:29,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 153 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 276 Invalid, 0 Unknown, 211 Unchecked, 0.1s Time] [2022-02-10 03:39:29,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-10 03:39:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 270. [2022-02-10 03:39:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.587360594795539) internal successors, (427), 269 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 427 transitions. [2022-02-10 03:39:29,142 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 427 transitions. Word has length 32 [2022-02-10 03:39:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:29,142 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 427 transitions. [2022-02-10 03:39:29,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 427 transitions. [2022-02-10 03:39:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:29,143 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:29,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:29,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:29,365 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 [2022-02-10 03:39:29,366 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:29,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:29,366 INFO L85 PathProgramCache]: Analyzing trace with hash 514741517, now seen corresponding path program 7 times [2022-02-10 03:39:29,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:29,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46084692] [2022-02-10 03:39:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:29,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:29,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:29,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46084692] [2022-02-10 03:39:29,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46084692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:29,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647093962] [2022-02-10 03:39:29,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:39:29,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:29,623 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) [2022-02-10 03:39:29,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-10 03:39:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:29,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:29,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-02-10 03:39:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:30,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:30,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-10 03:39:30,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:30,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:30,476 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:30,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-10 03:39:30,592 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 17 treesize of output 13 [2022-02-10 03:39:30,631 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:30,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647093962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:30,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:30,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 27 [2022-02-10 03:39:30,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848965274] [2022-02-10 03:39:30,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:30,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:39:30,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:30,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:39:30,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:39:30,633 INFO L87 Difference]: Start difference. First operand 270 states and 427 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:30,898 INFO L93 Difference]: Finished difference Result 408 states and 629 transitions. [2022-02-10 03:39:30,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-10 03:39:30,899 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-10 03:39:30,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:30,900 INFO L225 Difference]: With dead ends: 408 [2022-02-10 03:39:30,900 INFO L226 Difference]: Without dead ends: 391 [2022-02-10 03:39:30,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:39:30,901 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:30,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 133 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 226 Invalid, 0 Unknown, 133 Unchecked, 0.1s Time] [2022-02-10 03:39:30,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-10 03:39:30,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 285. [2022-02-10 03:39:30,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.5985915492957747) internal successors, (454), 284 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) [2022-02-10 03:39:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 454 transitions. [2022-02-10 03:39:30,906 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 454 transitions. Word has length 32 [2022-02-10 03:39:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:30,906 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 454 transitions. [2022-02-10 03:39:30,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:30,906 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 454 transitions. [2022-02-10 03:39:30,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:30,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:30,907 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:30,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:31,131 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 [2022-02-10 03:39:31,132 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash -589360435, now seen corresponding path program 8 times [2022-02-10 03:39:31,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:31,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718261771] [2022-02-10 03:39:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:31,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:39:31,360 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:31,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718261771] [2022-02-10 03:39:31,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718261771] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:31,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429224352] [2022-02-10 03:39:31,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:39:31,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:31,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:31,368 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) [2022-02-10 03:39:31,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-10 03:39:31,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:39:31,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:31,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:31,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:31,756 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 24 treesize of output 24 [2022-02-10 03:39:31,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:31,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:31,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 10 [2022-02-10 03:39:31,861 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:31,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:32,178 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:32,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-10 03:39:32,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:32,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429224352] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:32,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:32,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-10 03:39:32,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253285306] [2022-02-10 03:39:32,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:32,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:32,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:32,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:32,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:32,379 INFO L87 Difference]: Start difference. First operand 285 states and 454 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:32,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:32,733 INFO L93 Difference]: Finished difference Result 501 states and 779 transitions. [2022-02-10 03:39:32,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:32,734 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-10 03:39:32,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:32,736 INFO L225 Difference]: With dead ends: 501 [2022-02-10 03:39:32,736 INFO L226 Difference]: Without dead ends: 455 [2022-02-10 03:39:32,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2022-02-10 03:39:32,737 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 139 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:32,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 271 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 234 Invalid, 0 Unknown, 485 Unchecked, 0.1s Time] [2022-02-10 03:39:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-10 03:39:32,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 302. [2022-02-10 03:39:32,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.584717607973422) internal successors, (477), 301 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 477 transitions. [2022-02-10 03:39:32,752 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 477 transitions. Word has length 32 [2022-02-10 03:39:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:32,752 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 477 transitions. [2022-02-10 03:39:32,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 477 transitions. [2022-02-10 03:39:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-10 03:39:32,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:32,753 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:32,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:32,975 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 [2022-02-10 03:39:32,976 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:32,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1424352939, now seen corresponding path program 9 times [2022-02-10 03:39:32,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:32,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241224941] [2022-02-10 03:39:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:32,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:39:33,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:33,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241224941] [2022-02-10 03:39:33,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241224941] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:33,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667758792] [2022-02-10 03:39:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:33,210 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:33,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:33,211 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) [2022-02-10 03:39:33,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-10 03:39:33,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:39:33,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:33,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:33,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:33,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:33,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:33,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-02-10 03:39:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:33,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:35,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:35,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:35,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-02-10 03:39:35,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:35,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667758792] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:35,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:35,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 31 [2022-02-10 03:39:35,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415171012] [2022-02-10 03:39:35,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:35,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-10 03:39:35,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-10 03:39:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2022-02-10 03:39:35,557 INFO L87 Difference]: Start difference. First operand 302 states and 477 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:35,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:35,963 INFO L93 Difference]: Finished difference Result 408 states and 627 transitions. [2022-02-10 03:39:35,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:35,964 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-02-10 03:39:35,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:35,965 INFO L225 Difference]: With dead ends: 408 [2022-02-10 03:39:35,965 INFO L226 Difference]: Without dead ends: 395 [2022-02-10 03:39:35,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1637, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:39:35,966 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:35,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 135 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 169 Unchecked, 0.1s Time] [2022-02-10 03:39:35,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-10 03:39:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 319. [2022-02-10 03:39:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.5943396226415094) internal successors, (507), 318 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) [2022-02-10 03:39:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 507 transitions. [2022-02-10 03:39:35,972 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 507 transitions. Word has length 32 [2022-02-10 03:39:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:35,972 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 507 transitions. [2022-02-10 03:39:35,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 507 transitions. [2022-02-10 03:39:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:35,973 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:35,973 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:35,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:36,187 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 [2022-02-10 03:39:36,187 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash -668885306, now seen corresponding path program 1 times [2022-02-10 03:39:36,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:36,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633492228] [2022-02-10 03:39:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:36,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:36,456 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:36,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:36,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633492228] [2022-02-10 03:39:36,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633492228] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:36,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308515014] [2022-02-10 03:39:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:36,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:36,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:36,458 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) [2022-02-10 03:39:36,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-10 03:39:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:36,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:36,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:36,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:36,882 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 26 treesize of output 26 [2022-02-10 03:39:37,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:37,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:37,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-10 03:39:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:37,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:37,438 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:37,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-10 03:39:37,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:37,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308515014] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:37,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:37,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 28 [2022-02-10 03:39:37,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202031373] [2022-02-10 03:39:37,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:37,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:37,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:37,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:37,609 INFO L87 Difference]: Start difference. First operand 319 states and 507 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:37,859 INFO L93 Difference]: Finished difference Result 528 states and 829 transitions. [2022-02-10 03:39:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-10 03:39:37,863 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:37,864 INFO L225 Difference]: With dead ends: 528 [2022-02-10 03:39:37,864 INFO L226 Difference]: Without dead ends: 507 [2022-02-10 03:39:37,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=958, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:37,866 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:37,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 142 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 218 Invalid, 0 Unknown, 210 Unchecked, 0.1s Time] [2022-02-10 03:39:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-10 03:39:37,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 339. [2022-02-10 03:39:37,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.6242603550295858) internal successors, (549), 338 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 549 transitions. [2022-02-10 03:39:37,872 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 549 transitions. Word has length 35 [2022-02-10 03:39:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:37,873 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 549 transitions. [2022-02-10 03:39:37,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 28 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 549 transitions. [2022-02-10 03:39:37,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:37,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:37,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:37,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:38,087 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 [2022-02-10 03:39:38,088 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:38,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1267673798, now seen corresponding path program 2 times [2022-02-10 03:39:38,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:38,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121075602] [2022-02-10 03:39:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:38,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-02-10 03:39:38,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:38,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121075602] [2022-02-10 03:39:38,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121075602] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:38,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-10 03:39:38,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-10 03:39:38,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564940707] [2022-02-10 03:39:38,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:38,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-10 03:39:38,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-10 03:39:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-10 03:39:38,113 INFO L87 Difference]: Start difference. First operand 339 states and 549 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:38,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:38,126 INFO L93 Difference]: Finished difference Result 334 states and 527 transitions. [2022-02-10 03:39:38,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-10 03:39:38,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:38,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:38,127 INFO L225 Difference]: With dead ends: 334 [2022-02-10 03:39:38,127 INFO L226 Difference]: Without dead ends: 334 [2022-02-10 03:39:38,127 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 [2022-02-10 03:39:38,128 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:38,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:39:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-10 03:39:38,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 292. [2022-02-10 03:39:38,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.6460481099656357) internal successors, (479), 291 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:38,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 479 transitions. [2022-02-10 03:39:38,133 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 479 transitions. Word has length 35 [2022-02-10 03:39:38,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:38,133 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 479 transitions. [2022-02-10 03:39:38,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:38,133 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 479 transitions. [2022-02-10 03:39:38,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:38,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:38,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:38,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-10 03:39:38,135 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:38,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1240514822, now seen corresponding path program 3 times [2022-02-10 03:39:38,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:38,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143856995] [2022-02-10 03:39:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:38,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:38,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:38,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143856995] [2022-02-10 03:39:38,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143856995] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:38,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849310763] [2022-02-10 03:39:38,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:38,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:38,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:38,396 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) [2022-02-10 03:39:38,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-10 03:39:38,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:39:38,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:38,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:38,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:38,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:38,670 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 27 [2022-02-10 03:39:38,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:38,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 38 [2022-02-10 03:39:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:39,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:40,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:40,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:40,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 45 [2022-02-10 03:39:40,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:40,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849310763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:40,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:40,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 35 [2022-02-10 03:39:40,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256919532] [2022-02-10 03:39:40,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:40,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-10 03:39:40,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-10 03:39:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2022-02-10 03:39:40,469 INFO L87 Difference]: Start difference. First operand 292 states and 479 transitions. Second operand has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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) [2022-02-10 03:39:41,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:41,056 INFO L93 Difference]: Finished difference Result 435 states and 680 transitions. [2022-02-10 03:39:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-10 03:39:41,056 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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 35 [2022-02-10 03:39:41,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:41,057 INFO L225 Difference]: With dead ends: 435 [2022-02-10 03:39:41,057 INFO L226 Difference]: Without dead ends: 410 [2022-02-10 03:39:41,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=538, Invalid=2432, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:39:41,058 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 94 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:41,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 164 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 112 Unchecked, 0.0s Time] [2022-02-10 03:39:41,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-02-10 03:39:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 308. [2022-02-10 03:39:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.6612377850162867) internal successors, (510), 307 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 510 transitions. [2022-02-10 03:39:41,062 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 510 transitions. Word has length 35 [2022-02-10 03:39:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:41,062 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 510 transitions. [2022-02-10 03:39:41,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.388888888888889) internal successors, (86), 35 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) [2022-02-10 03:39:41,063 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 510 transitions. [2022-02-10 03:39:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:41,063 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:41,063 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:41,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-02-10 03:39:41,275 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,SelfDestructingSolverStorable13 [2022-02-10 03:39:41,276 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:41,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:41,276 INFO L85 PathProgramCache]: Analyzing trace with hash 992621160, now seen corresponding path program 4 times [2022-02-10 03:39:41,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:41,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076464628] [2022-02-10 03:39:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:41,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:41,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:41,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:41,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076464628] [2022-02-10 03:39:41,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076464628] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:41,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068793548] [2022-02-10 03:39:41,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:41,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:41,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:41,527 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) [2022-02-10 03:39:41,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-10 03:39:41,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:41,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:41,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:41,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:41,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:41,786 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 27 [2022-02-10 03:39:41,918 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-02-10 03:39:41,918 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 10 [2022-02-10 03:39:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:41,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:42,223 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:42,223 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 34 treesize of output 56 [2022-02-10 03:39:42,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:42,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:42,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068793548] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:42,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:42,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 25 [2022-02-10 03:39:42,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622728790] [2022-02-10 03:39:42,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:42,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-10 03:39:42,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:42,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-10 03:39:42,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-02-10 03:39:42,376 INFO L87 Difference]: Start difference. First operand 308 states and 510 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:42,626 INFO L93 Difference]: Finished difference Result 554 states and 895 transitions. [2022-02-10 03:39:42,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:39:42,626 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:42,627 INFO L225 Difference]: With dead ends: 554 [2022-02-10 03:39:42,627 INFO L226 Difference]: Without dead ends: 548 [2022-02-10 03:39:42,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-02-10 03:39:42,628 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 111 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:42,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 256 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 488 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-02-10 03:39:42,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-02-10 03:39:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 303. [2022-02-10 03:39:42,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.6523178807947019) internal successors, (499), 302 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:42,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 499 transitions. [2022-02-10 03:39:42,633 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 499 transitions. Word has length 35 [2022-02-10 03:39:42,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:42,633 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 499 transitions. [2022-02-10 03:39:42,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:42,633 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 499 transitions. [2022-02-10 03:39:42,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:42,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:42,634 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:42,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:42,843 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,SelfDestructingSolverStorable14 [2022-02-10 03:39:42,843 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1693698916, now seen corresponding path program 5 times [2022-02-10 03:39:42,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:42,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631373691] [2022-02-10 03:39:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:42,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:43,080 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:43,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631373691] [2022-02-10 03:39:43,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631373691] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:43,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183509394] [2022-02-10 03:39:43,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:43,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:43,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:43,083 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) [2022-02-10 03:39:43,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-10 03:39:43,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:39:43,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:43,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:43,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:43,521 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:43,522 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 24 treesize of output 24 [2022-02-10 03:39:43,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:43,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:43,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 22 treesize of output 10 [2022-02-10 03:39:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:43,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:44,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:44,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:44,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 57 [2022-02-10 03:39:44,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:44,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183509394] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:44,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:44,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 33 [2022-02-10 03:39:44,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903743123] [2022-02-10 03:39:44,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:44,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-10 03:39:44,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-10 03:39:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=905, Unknown=0, NotChecked=0, Total=1122 [2022-02-10 03:39:44,246 INFO L87 Difference]: Start difference. First operand 303 states and 499 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:44,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:44,606 INFO L93 Difference]: Finished difference Result 463 states and 731 transitions. [2022-02-10 03:39:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:44,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:44,607 INFO L225 Difference]: With dead ends: 463 [2022-02-10 03:39:44,607 INFO L226 Difference]: Without dead ends: 452 [2022-02-10 03:39:44,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-02-10 03:39:44,608 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 98 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:44,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 136 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 234 Invalid, 0 Unknown, 168 Unchecked, 0.1s Time] [2022-02-10 03:39:44,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-02-10 03:39:44,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 292. [2022-02-10 03:39:44,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.6391752577319587) internal successors, (477), 291 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 477 transitions. [2022-02-10 03:39:44,613 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 477 transitions. Word has length 35 [2022-02-10 03:39:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:44,613 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 477 transitions. [2022-02-10 03:39:44,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:44,614 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 477 transitions. [2022-02-10 03:39:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:44,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:44,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:44,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:44,819 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,SelfDestructingSolverStorable15 [2022-02-10 03:39:44,819 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:44,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:44,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1247851616, now seen corresponding path program 6 times [2022-02-10 03:39:44,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:44,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186237319] [2022-02-10 03:39:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:44,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:45,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:45,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186237319] [2022-02-10 03:39:45,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186237319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:45,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219372544] [2022-02-10 03:39:45,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:39:45,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:45,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:45,075 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) [2022-02-10 03:39:45,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-10 03:39:45,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:39:45,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 22 conjunts are in the unsatisfiable core [2022-02-10 03:39:45,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:45,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:45,377 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 27 treesize of output 25 [2022-02-10 03:39:45,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:45,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:45,721 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 26 [2022-02-10 03:39:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:45,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:48,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:48,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:48,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 37 [2022-02-10 03:39:48,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:48,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219372544] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:48,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:48,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 34 [2022-02-10 03:39:48,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100816319] [2022-02-10 03:39:48,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:48,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-10 03:39:48,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:48,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-10 03:39:48,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:48,644 INFO L87 Difference]: Start difference. First operand 292 states and 477 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2022-02-10 03:39:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:50,002 INFO L93 Difference]: Finished difference Result 832 states and 1298 transitions. [2022-02-10 03:39:50,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-10 03:39:50,002 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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 35 [2022-02-10 03:39:50,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:50,003 INFO L225 Difference]: With dead ends: 832 [2022-02-10 03:39:50,003 INFO L226 Difference]: Without dead ends: 788 [2022-02-10 03:39:50,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1069, Invalid=4187, Unknown=0, NotChecked=0, Total=5256 [2022-02-10 03:39:50,005 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 363 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 680 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:50,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 331 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 376 Invalid, 0 Unknown, 680 Unchecked, 0.2s Time] [2022-02-10 03:39:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-02-10 03:39:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 383. [2022-02-10 03:39:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 1.6832460732984293) internal successors, (643), 382 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 643 transitions. [2022-02-10 03:39:50,012 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 643 transitions. Word has length 35 [2022-02-10 03:39:50,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:50,012 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 643 transitions. [2022-02-10 03:39:50,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2022-02-10 03:39:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 643 transitions. [2022-02-10 03:39:50,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:50,013 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:50,013 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:50,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-02-10 03:39:50,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:50,231 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash -991730562, now seen corresponding path program 7 times [2022-02-10 03:39:50,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:50,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700086312] [2022-02-10 03:39:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:50,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:50,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:50,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700086312] [2022-02-10 03:39:50,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700086312] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:50,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490156631] [2022-02-10 03:39:50,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:39:50,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:50,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:50,452 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) [2022-02-10 03:39:50,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-10 03:39:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:50,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:50,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:50,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:50,795 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 26 treesize of output 26 [2022-02-10 03:39:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:50,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:50,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-02-10 03:39:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:50,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:51,237 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:51,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-02-10 03:39:51,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:51,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490156631] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:51,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:51,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-10 03:39:51,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811686241] [2022-02-10 03:39:51,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:51,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:51,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:51,501 INFO L87 Difference]: Start difference. First operand 383 states and 643 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:51,721 INFO L93 Difference]: Finished difference Result 545 states and 873 transitions. [2022-02-10 03:39:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-10 03:39:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:51,722 INFO L225 Difference]: With dead ends: 545 [2022-02-10 03:39:51,722 INFO L226 Difference]: Without dead ends: 529 [2022-02-10 03:39:51,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2022-02-10 03:39:51,722 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:51,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 121 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 148 Invalid, 0 Unknown, 186 Unchecked, 0.1s Time] [2022-02-10 03:39:51,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-02-10 03:39:51,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 406. [2022-02-10 03:39:51,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.6790123456790123) internal successors, (680), 405 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:51,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 680 transitions. [2022-02-10 03:39:51,729 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 680 transitions. Word has length 35 [2022-02-10 03:39:51,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:51,730 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 680 transitions. [2022-02-10 03:39:51,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:51,730 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 680 transitions. [2022-02-10 03:39:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:51,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:51,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:51,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:51,953 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,SelfDestructingSolverStorable17 [2022-02-10 03:39:51,954 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1246249956, now seen corresponding path program 8 times [2022-02-10 03:39:51,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:51,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129646319] [2022-02-10 03:39:51,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:51,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:52,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:52,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129646319] [2022-02-10 03:39:52,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129646319] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:52,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176786346] [2022-02-10 03:39:52,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:39:52,169 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:52,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:52,170 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) [2022-02-10 03:39:52,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-10 03:39:52,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:39:52,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:52,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2022-02-10 03:39:52,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:52,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:52,472 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 24 treesize of output 24 [2022-02-10 03:39:52,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:52,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:52,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-02-10 03:39:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:52,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:52,857 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:52,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-10 03:39:52,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:39:52,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176786346] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:52,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:52,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 26 [2022-02-10 03:39:52,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183481647] [2022-02-10 03:39:52,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:52,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-10 03:39:53,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:53,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-10 03:39:53,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-02-10 03:39:53,000 INFO L87 Difference]: Start difference. First operand 406 states and 680 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:53,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:53,165 INFO L93 Difference]: Finished difference Result 687 states and 1120 transitions. [2022-02-10 03:39:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-10 03:39:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:53,166 INFO L225 Difference]: With dead ends: 687 [2022-02-10 03:39:53,166 INFO L226 Difference]: Without dead ends: 676 [2022-02-10 03:39:53,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-02-10 03:39:53,167 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 139 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 230 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-02-10 03:39:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-10 03:39:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 405. [2022-02-10 03:39:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.6782178217821782) internal successors, (678), 404 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 678 transitions. [2022-02-10 03:39:53,172 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 678 transitions. Word has length 35 [2022-02-10 03:39:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 678 transitions. [2022-02-10 03:39:53,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 678 transitions. [2022-02-10 03:39:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-10 03:39:53,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:53,173 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:53,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-02-10 03:39:53,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:53,374 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash -260418554, now seen corresponding path program 9 times [2022-02-10 03:39:53,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:53,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059998052] [2022-02-10 03:39:53,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:53,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:53,595 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:53,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059998052] [2022-02-10 03:39:53,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059998052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:53,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960023299] [2022-02-10 03:39:53,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:39:53,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:53,596 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) [2022-02-10 03:39:53,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-10 03:39:53,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:39:53,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:53,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-10 03:39:53,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:54,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:54,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2022-02-10 03:39:54,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:54,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:54,073 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 22 treesize of output 10 [2022-02-10 03:39:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:54,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:54,377 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:54,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-02-10 03:39:54,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:54,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960023299] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:54,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:54,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 27 [2022-02-10 03:39:54,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739061158] [2022-02-10 03:39:54,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-10 03:39:54,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-10 03:39:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-02-10 03:39:54,509 INFO L87 Difference]: Start difference. First operand 405 states and 678 transitions. Second operand has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:54,769 INFO L93 Difference]: Finished difference Result 719 states and 1174 transitions. [2022-02-10 03:39:54,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-10 03:39:54,769 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-02-10 03:39:54,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:54,770 INFO L225 Difference]: With dead ends: 719 [2022-02-10 03:39:54,770 INFO L226 Difference]: Without dead ends: 708 [2022-02-10 03:39:54,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2022-02-10 03:39:54,771 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 98 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:54,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 142 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 331 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-02-10 03:39:54,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-02-10 03:39:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 405. [2022-02-10 03:39:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 1.6782178217821782) internal successors, (678), 404 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:54,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 678 transitions. [2022-02-10 03:39:54,778 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 678 transitions. Word has length 35 [2022-02-10 03:39:54,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:54,778 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 678 transitions. [2022-02-10 03:39:54,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.392857142857143) internal successors, (67), 27 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 678 transitions. [2022-02-10 03:39:54,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-10 03:39:54,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:54,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:54,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:54,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:54,999 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -2143892486, now seen corresponding path program 10 times [2022-02-10 03:39:55,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:55,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328420457] [2022-02-10 03:39:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:55,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:55,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:55,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:55,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328420457] [2022-02-10 03:39:55,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328420457] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:55,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21644919] [2022-02-10 03:39:55,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:55,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:55,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:55,062 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) [2022-02-10 03:39:55,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-10 03:39:55,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:55,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:55,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:39:55,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:55,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:55,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21644919] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:55,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:55,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 8 [2022-02-10 03:39:55,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949436970] [2022-02-10 03:39:55,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:55,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-10 03:39:55,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:55,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-10 03:39:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-10 03:39:55,222 INFO L87 Difference]: Start difference. First operand 405 states and 678 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:55,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:55,266 INFO L93 Difference]: Finished difference Result 644 states and 1056 transitions. [2022-02-10 03:39:55,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-10 03:39:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-02-10 03:39:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:55,267 INFO L225 Difference]: With dead ends: 644 [2022-02-10 03:39:55,267 INFO L226 Difference]: Without dead ends: 630 [2022-02-10 03:39:55,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-02-10 03:39:55,268 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 77 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:55,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 70 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:39:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-02-10 03:39:55,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 546. [2022-02-10 03:39:55,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 545 states have (on average 1.6844036697247706) internal successors, (918), 545 states have internal predecessors, (918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:55,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 918 transitions. [2022-02-10 03:39:55,276 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 918 transitions. Word has length 36 [2022-02-10 03:39:55,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:55,276 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 918 transitions. [2022-02-10 03:39:55,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:55,276 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 918 transitions. [2022-02-10 03:39:55,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-10 03:39:55,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:55,278 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:55,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:55,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:55,485 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -669493733, now seen corresponding path program 11 times [2022-02-10 03:39:55,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:55,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126672163] [2022-02-10 03:39:55,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:55,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-02-10 03:39:55,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:55,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126672163] [2022-02-10 03:39:55,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126672163] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:55,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175469066] [2022-02-10 03:39:55,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:55,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:55,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:55,519 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) [2022-02-10 03:39:55,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-10 03:39:55,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:39:55,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:55,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:39:55,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-02-10 03:39:55,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-10 03:39:55,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175469066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:55,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-10 03:39:55,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-02-10 03:39:55,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902626708] [2022-02-10 03:39:55,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:55,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-10 03:39:55,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:55,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-10 03:39:55,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:39:55,594 INFO L87 Difference]: Start difference. First operand 546 states and 918 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:55,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:55,606 INFO L93 Difference]: Finished difference Result 633 states and 1038 transitions. [2022-02-10 03:39:55,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-10 03:39:55,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-02-10 03:39:55,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:55,607 INFO L225 Difference]: With dead ends: 633 [2022-02-10 03:39:55,607 INFO L226 Difference]: Without dead ends: 633 [2022-02-10 03:39:55,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-10 03:39:55,608 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:55,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:39:55,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-10 03:39:55,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 373. [2022-02-10 03:39:55,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 1.596774193548387) internal successors, (594), 372 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:55,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 594 transitions. [2022-02-10 03:39:55,614 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 594 transitions. Word has length 37 [2022-02-10 03:39:55,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:55,614 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 594 transitions. [2022-02-10 03:39:55,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:55,614 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 594 transitions. [2022-02-10 03:39:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-10 03:39:55,615 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:55,615 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:55,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:55,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:55,835 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1204040643, now seen corresponding path program 10 times [2022-02-10 03:39:55,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:55,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004195495] [2022-02-10 03:39:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:55,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:56,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:56,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:56,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004195495] [2022-02-10 03:39:56,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004195495] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:56,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298609375] [2022-02-10 03:39:56,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:39:56,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:56,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:56,077 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) [2022-02-10 03:39:56,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-10 03:39:56,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:39:56,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:56,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-02-10 03:39:56,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:56,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:56,513 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 26 treesize of output 26 [2022-02-10 03:39:56,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:56,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:56,603 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 24 treesize of output 10 [2022-02-10 03:39:56,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:56,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:39:57,003 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-02-10 03:39:57,004 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 34 treesize of output 56 [2022-02-10 03:39:57,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:39:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-02-10 03:39:57,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298609375] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:39:57,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:39:57,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-02-10 03:39:57,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115087] [2022-02-10 03:39:57,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:39:57,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-10 03:39:57,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-10 03:39:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2022-02-10 03:39:57,198 INFO L87 Difference]: Start difference. First operand 373 states and 594 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:57,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:57,448 INFO L93 Difference]: Finished difference Result 644 states and 1021 transitions. [2022-02-10 03:39:57,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-10 03:39:57,449 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-02-10 03:39:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:57,450 INFO L225 Difference]: With dead ends: 644 [2022-02-10 03:39:57,450 INFO L226 Difference]: Without dead ends: 631 [2022-02-10 03:39:57,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2022-02-10 03:39:57,450 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 81 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:57,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 185 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 149 Unchecked, 0.0s Time] [2022-02-10 03:39:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2022-02-10 03:39:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 377. [2022-02-10 03:39:57,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.6063829787234043) internal successors, (604), 376 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:57,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 604 transitions. [2022-02-10 03:39:57,456 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 604 transitions. Word has length 38 [2022-02-10 03:39:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:57,456 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 604 transitions. [2022-02-10 03:39:57,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:57,457 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 604 transitions. [2022-02-10 03:39:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-10 03:39:57,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:57,458 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:57,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:57,681 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,SelfDestructingSolverStorable22 [2022-02-10 03:39:57,681 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash -24260186, now seen corresponding path program 11 times [2022-02-10 03:39:57,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:57,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006363792] [2022-02-10 03:39:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:57,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:57,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:57,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-02-10 03:39:57,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:57,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006363792] [2022-02-10 03:39:57,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006363792] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:57,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969435886] [2022-02-10 03:39:57,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:39:57,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:57,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:57,733 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) [2022-02-10 03:39:57,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-10 03:39:57,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-02-10 03:39:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:57,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-10 03:39:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-02-10 03:39:57,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-10 03:39:57,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969435886] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-10 03:39:57,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-10 03:39:57,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2022-02-10 03:39:57,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566215693] [2022-02-10 03:39:57,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-10 03:39:57,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-10 03:39:57,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:39:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-10 03:39:57,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:39:57,835 INFO L87 Difference]: Start difference. First operand 377 states and 604 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:57,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:39:57,851 INFO L93 Difference]: Finished difference Result 455 states and 710 transitions. [2022-02-10 03:39:57,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-10 03:39:57,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-02-10 03:39:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:39:57,852 INFO L225 Difference]: With dead ends: 455 [2022-02-10 03:39:57,852 INFO L226 Difference]: Without dead ends: 455 [2022-02-10 03:39:57,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-10 03:39:57,853 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 33 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-10 03:39:57,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 53 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-10 03:39:57,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-02-10 03:39:57,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 301. [2022-02-10 03:39:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.51) internal successors, (453), 300 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 453 transitions. [2022-02-10 03:39:57,858 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 453 transitions. Word has length 40 [2022-02-10 03:39:57,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:39:57,858 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 453 transitions. [2022-02-10 03:39:57,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:39:57,859 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 453 transitions. [2022-02-10 03:39:57,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:39:57,859 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:39:57,860 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:39:57,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-10 03:39:58,081 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,SelfDestructingSolverStorable23 [2022-02-10 03:39:58,082 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:39:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:39:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2024155020, now seen corresponding path program 12 times [2022-02-10 03:39:58,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:39:58,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832501366] [2022-02-10 03:39:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:39:58,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:39:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:39:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:58,601 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:39:58,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832501366] [2022-02-10 03:39:58,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832501366] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:39:58,601 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006357962] [2022-02-10 03:39:58,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:39:58,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:39:58,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:39:58,603 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) [2022-02-10 03:39:58,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-10 03:39:58,629 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:39:58,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:39:58,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:39:58,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:39:59,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:59,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-02-10 03:39:59,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:39:59,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:39:59,625 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:39:59,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2022-02-10 03:39:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:39:59,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:03,148 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-10 03:40:03,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 102 [2022-02-10 03:40:03,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:03,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006357962] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:03,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:03,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-10 03:40:03,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729940785] [2022-02-10 03:40:03,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:03,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:40:03,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:03,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:40:03,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:40:03,614 INFO L87 Difference]: Start difference. First operand 301 states and 453 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:05,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:05,156 INFO L93 Difference]: Finished difference Result 553 states and 821 transitions. [2022-02-10 03:40:05,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-10 03:40:05,156 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:05,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:05,157 INFO L225 Difference]: With dead ends: 553 [2022-02-10 03:40:05,157 INFO L226 Difference]: Without dead ends: 547 [2022-02-10 03:40:05,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=940, Invalid=5866, Unknown=0, NotChecked=0, Total=6806 [2022-02-10 03:40:05,160 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 441 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:05,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 361 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 441 Unchecked, 0.1s Time] [2022-02-10 03:40:05,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-02-10 03:40:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 359. [2022-02-10 03:40:05,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.5614525139664805) internal successors, (559), 358 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 559 transitions. [2022-02-10 03:40:05,166 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 559 transitions. Word has length 41 [2022-02-10 03:40:05,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:05,166 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 559 transitions. [2022-02-10 03:40:05,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:05,166 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 559 transitions. [2022-02-10 03:40:05,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:05,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:05,167 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:05,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:05,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:05,391 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:05,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:05,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1695529784, now seen corresponding path program 13 times [2022-02-10 03:40:05,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:05,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438787093] [2022-02-10 03:40:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:05,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:05,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:05,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438787093] [2022-02-10 03:40:05,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438787093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:05,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608949109] [2022-02-10 03:40:05,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:40:05,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:05,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:05,894 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) [2022-02-10 03:40:05,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-10 03:40:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:05,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:06,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:06,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-02-10 03:40:06,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:06,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:06,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:06,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:06,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:06,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:06,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:40:06,905 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:06,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:07,720 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:07,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-02-10 03:40:08,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:08,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608949109] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:08,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:08,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 48 [2022-02-10 03:40:08,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138000504] [2022-02-10 03:40:08,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:08,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-10 03:40:08,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-10 03:40:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:40:08,529 INFO L87 Difference]: Start difference. First operand 359 states and 559 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:09,465 INFO L93 Difference]: Finished difference Result 907 states and 1387 transitions. [2022-02-10 03:40:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-10 03:40:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:09,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:09,467 INFO L225 Difference]: With dead ends: 907 [2022-02-10 03:40:09,467 INFO L226 Difference]: Without dead ends: 901 [2022-02-10 03:40:09,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=458, Invalid=3324, Unknown=0, NotChecked=0, Total=3782 [2022-02-10 03:40:09,469 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 152 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:09,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 600 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 671 Invalid, 0 Unknown, 1102 Unchecked, 0.3s Time] [2022-02-10 03:40:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-02-10 03:40:09,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 421. [2022-02-10 03:40:09,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 1.5714285714285714) internal successors, (660), 420 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 660 transitions. [2022-02-10 03:40:09,475 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 660 transitions. Word has length 41 [2022-02-10 03:40:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:09,475 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 660 transitions. [2022-02-10 03:40:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 660 transitions. [2022-02-10 03:40:09,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:09,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:09,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:09,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:09,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:09,677 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:09,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:09,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1638593966, now seen corresponding path program 14 times [2022-02-10 03:40:09,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:09,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029128898] [2022-02-10 03:40:09,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:09,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:10,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:10,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029128898] [2022-02-10 03:40:10,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029128898] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:10,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272816294] [2022-02-10 03:40:10,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:40:10,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:10,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:10,207 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) [2022-02-10 03:40:10,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-10 03:40:10,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:40:10,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:10,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:40:10,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:10,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:10,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-02-10 03:40:11,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:11,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:11,571 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:11,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2022-02-10 03:40:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:11,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:18,107 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-02-10 03:40:18,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 102 [2022-02-10 03:40:19,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:19,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272816294] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:19,061 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:19,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-10 03:40:19,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025022939] [2022-02-10 03:40:19,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:19,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:40:19,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:19,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:40:19,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2445, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:40:19,063 INFO L87 Difference]: Start difference. First operand 421 states and 660 transitions. Second operand has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:21,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:21,378 INFO L93 Difference]: Finished difference Result 935 states and 1389 transitions. [2022-02-10 03:40:21,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:40:21,379 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:21,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:21,380 INFO L225 Difference]: With dead ends: 935 [2022-02-10 03:40:21,380 INFO L226 Difference]: Without dead ends: 929 [2022-02-10 03:40:21,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2917 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1182, Invalid=7374, Unknown=0, NotChecked=0, Total=8556 [2022-02-10 03:40:21,381 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 186 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 642 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:21,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 396 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 220 Invalid, 0 Unknown, 642 Unchecked, 0.1s Time] [2022-02-10 03:40:21,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-02-10 03:40:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 448. [2022-02-10 03:40:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 1.58165548098434) internal successors, (707), 447 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 707 transitions. [2022-02-10 03:40:21,389 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 707 transitions. Word has length 41 [2022-02-10 03:40:21,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:21,389 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 707 transitions. [2022-02-10 03:40:21,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:21,389 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 707 transitions. [2022-02-10 03:40:21,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:21,390 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:21,390 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:21,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-02-10 03:40:21,611 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,SelfDestructingSolverStorable26 [2022-02-10 03:40:21,611 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:21,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:21,612 INFO L85 PathProgramCache]: Analyzing trace with hash -437002066, now seen corresponding path program 15 times [2022-02-10 03:40:21,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:21,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732808467] [2022-02-10 03:40:21,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:21,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:22,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:22,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732808467] [2022-02-10 03:40:22,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732808467] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:22,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590986339] [2022-02-10 03:40:22,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:40:22,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:22,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:22,037 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) [2022-02-10 03:40:22,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-10 03:40:22,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:40:22,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:40:22,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:22,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:22,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-02-10 03:40:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:22,756 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:22,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2022-02-10 03:40:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:23,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:23,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:23,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:23,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:23,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:24,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:24,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 43 treesize of output 55 [2022-02-10 03:40:24,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:24,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590986339] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:24,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:24,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 53 [2022-02-10 03:40:24,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65849299] [2022-02-10 03:40:24,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:24,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-10 03:40:24,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:24,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-10 03:40:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2385, Unknown=0, NotChecked=0, Total=2862 [2022-02-10 03:40:24,184 INFO L87 Difference]: Start difference. First operand 448 states and 707 transitions. Second operand has 54 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:30,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:30,162 INFO L93 Difference]: Finished difference Result 1989 states and 3065 transitions. [2022-02-10 03:40:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-10 03:40:30,163 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:30,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:30,165 INFO L225 Difference]: With dead ends: 1989 [2022-02-10 03:40:30,165 INFO L226 Difference]: Without dead ends: 1959 [2022-02-10 03:40:30,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 61 SyntacticMatches, 15 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6798 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2864, Invalid=17158, Unknown=0, NotChecked=0, Total=20022 [2022-02-10 03:40:30,168 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 504 mSDsluCounter, 1114 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 3410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2007 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:30,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 1036 Invalid, 3410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1224 Invalid, 0 Unknown, 2007 Unchecked, 0.6s Time] [2022-02-10 03:40:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-02-10 03:40:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 594. [2022-02-10 03:40:30,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 1.6779089376053964) internal successors, (995), 593 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) [2022-02-10 03:40:30,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 995 transitions. [2022-02-10 03:40:30,182 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 995 transitions. Word has length 41 [2022-02-10 03:40:30,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:30,183 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 995 transitions. [2022-02-10 03:40:30,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 53 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 995 transitions. [2022-02-10 03:40:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:30,184 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:30,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:30,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:30,400 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,SelfDestructingSolverStorable27 [2022-02-10 03:40:30,401 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:30,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:30,401 INFO L85 PathProgramCache]: Analyzing trace with hash 29549192, now seen corresponding path program 16 times [2022-02-10 03:40:30,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:30,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215527965] [2022-02-10 03:40:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:30,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:40:30,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:30,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215527965] [2022-02-10 03:40:30,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215527965] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:30,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625249396] [2022-02-10 03:40:30,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:40:30,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:30,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:30,824 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) [2022-02-10 03:40:30,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-10 03:40:30,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:40:30,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:31,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:31,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-02-10 03:40:31,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:31,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:31,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:31,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:31,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:31,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:31,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:40:31,793 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:31,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:32,457 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:32,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-02-10 03:40:32,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:32,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625249396] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:32,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:32,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-10 03:40:32,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140198636] [2022-02-10 03:40:32,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:40:32,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:32,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:40:32,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:40:32,881 INFO L87 Difference]: Start difference. First operand 594 states and 995 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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) [2022-02-10 03:40:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:34,375 INFO L93 Difference]: Finished difference Result 1300 states and 2068 transitions. [2022-02-10 03:40:34,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-10 03:40:34,375 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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 41 [2022-02-10 03:40:34,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:34,377 INFO L225 Difference]: With dead ends: 1300 [2022-02-10 03:40:34,377 INFO L226 Difference]: Without dead ends: 1277 [2022-02-10 03:40:34,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2359 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=854, Invalid=5626, Unknown=0, NotChecked=0, Total=6480 [2022-02-10 03:40:34,378 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 161 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 766 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:34,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 369 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 482 Invalid, 0 Unknown, 766 Unchecked, 0.2s Time] [2022-02-10 03:40:34,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-02-10 03:40:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 687. [2022-02-10 03:40:34,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 1.7303206997084548) internal successors, (1187), 686 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1187 transitions. [2022-02-10 03:40:34,389 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1187 transitions. Word has length 41 [2022-02-10 03:40:34,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:34,389 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1187 transitions. [2022-02-10 03:40:34,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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) [2022-02-10 03:40:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1187 transitions. [2022-02-10 03:40:34,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:34,391 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:34,391 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:34,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:34,608 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,SelfDestructingSolverStorable28 [2022-02-10 03:40:34,608 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:34,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2117463714, now seen corresponding path program 17 times [2022-02-10 03:40:34,609 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:34,609 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576258562] [2022-02-10 03:40:34,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:34,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:40:35,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:35,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576258562] [2022-02-10 03:40:35,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576258562] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:35,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975023601] [2022-02-10 03:40:35,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:40:35,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:35,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:35,056 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) [2022-02-10 03:40:35,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-10 03:40:35,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:40:35,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:35,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:35,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:35,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-02-10 03:40:36,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:36,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:36,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:36,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:36,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:36,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:36,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-02-10 03:40:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:37,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:37,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:37,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 94 [2022-02-10 03:40:37,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:37,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:37,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975023601] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:37,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:37,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 52 [2022-02-10 03:40:37,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266279527] [2022-02-10 03:40:37,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:37,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-10 03:40:37,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:37,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-10 03:40:37,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=2243, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:40:37,477 INFO L87 Difference]: Start difference. First operand 687 states and 1187 transitions. Second operand has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:40,160 INFO L93 Difference]: Finished difference Result 1556 states and 2567 transitions. [2022-02-10 03:40:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-10 03:40:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:40,162 INFO L225 Difference]: With dead ends: 1556 [2022-02-10 03:40:40,162 INFO L226 Difference]: Without dead ends: 1530 [2022-02-10 03:40:40,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1828, Invalid=8072, Unknown=0, NotChecked=0, Total=9900 [2022-02-10 03:40:40,165 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:40,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 357 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 508 Invalid, 0 Unknown, 1148 Unchecked, 0.3s Time] [2022-02-10 03:40:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1530 states. [2022-02-10 03:40:40,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1530 to 872. [2022-02-10 03:40:40,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 1.8185993111366245) internal successors, (1584), 871 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:40,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1584 transitions. [2022-02-10 03:40:40,181 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1584 transitions. Word has length 41 [2022-02-10 03:40:40,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:40,181 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 1584 transitions. [2022-02-10 03:40:40,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:40,182 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1584 transitions. [2022-02-10 03:40:40,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:40,183 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:40,184 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:40,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:40,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:40,405 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash 674712674, now seen corresponding path program 18 times [2022-02-10 03:40:40,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:40,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566090500] [2022-02-10 03:40:40,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:40,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:40:40,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:40,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566090500] [2022-02-10 03:40:40,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566090500] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:40,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821976597] [2022-02-10 03:40:40,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:40:40,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:40,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:40,944 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) [2022-02-10 03:40:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-10 03:40:40,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:40:40,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:40,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 36 conjunts are in the unsatisfiable core [2022-02-10 03:40:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:42,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:42,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-02-10 03:40:42,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:42,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:42,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:42,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:42,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:42,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 23 [2022-02-10 03:40:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:42,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:43,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:43,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:43,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:43,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:43,886 INFO L353 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2022-02-10 03:40:43,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 86 [2022-02-10 03:40:44,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:44,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821976597] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:44,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:44,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 20] total 51 [2022-02-10 03:40:44,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407515843] [2022-02-10 03:40:44,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:44,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-10 03:40:44,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-10 03:40:44,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2257, Unknown=0, NotChecked=0, Total=2652 [2022-02-10 03:40:44,532 INFO L87 Difference]: Start difference. First operand 872 states and 1584 transitions. Second operand has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:48,739 INFO L93 Difference]: Finished difference Result 2214 states and 3794 transitions. [2022-02-10 03:40:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-10 03:40:48,739 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:48,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:48,742 INFO L225 Difference]: With dead ends: 2214 [2022-02-10 03:40:48,742 INFO L226 Difference]: Without dead ends: 2189 [2022-02-10 03:40:48,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 69 SyntacticMatches, 13 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2249, Invalid=13753, Unknown=0, NotChecked=0, Total=16002 [2022-02-10 03:40:48,744 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 267 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 4820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4084 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:48,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 632 Invalid, 4820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 661 Invalid, 0 Unknown, 4084 Unchecked, 0.3s Time] [2022-02-10 03:40:48,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2189 states. [2022-02-10 03:40:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2189 to 1069. [2022-02-10 03:40:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 1.8558052434456929) internal successors, (1982), 1068 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1982 transitions. [2022-02-10 03:40:48,761 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1982 transitions. Word has length 41 [2022-02-10 03:40:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:48,761 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 1982 transitions. [2022-02-10 03:40:48,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9807692307692308) internal successors, (103), 51 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1982 transitions. [2022-02-10 03:40:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:48,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:48,763 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:48,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:48,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:48,985 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:48,985 INFO L85 PathProgramCache]: Analyzing trace with hash -906614852, now seen corresponding path program 19 times [2022-02-10 03:40:48,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:48,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404226670] [2022-02-10 03:40:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:48,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:49,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:49,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404226670] [2022-02-10 03:40:49,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404226670] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:49,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925057097] [2022-02-10 03:40:49,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:40:49,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:49,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:49,400 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) [2022-02-10 03:40:49,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-10 03:40:49,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:49,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:49,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:50,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:50,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-02-10 03:40:50,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:50,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:50,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:50,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:50,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:50,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:50,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:50,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:40:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:50,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:51,010 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:51,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-02-10 03:40:51,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:51,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925057097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:51,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:51,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 45 [2022-02-10 03:40:51,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144368981] [2022-02-10 03:40:51,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:51,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:40:51,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:51,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:40:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:40:51,457 INFO L87 Difference]: Start difference. First operand 1069 states and 1982 transitions. Second operand has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:52,614 INFO L93 Difference]: Finished difference Result 1865 states and 3290 transitions. [2022-02-10 03:40:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-10 03:40:52,614 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:40:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:52,616 INFO L225 Difference]: With dead ends: 1865 [2022-02-10 03:40:52,617 INFO L226 Difference]: Without dead ends: 1848 [2022-02-10 03:40:52,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2039 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=841, Invalid=5011, Unknown=0, NotChecked=0, Total=5852 [2022-02-10 03:40:52,618 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 140 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:52,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 268 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 479 Invalid, 0 Unknown, 1137 Unchecked, 0.2s Time] [2022-02-10 03:40:52,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-02-10 03:40:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1483. [2022-02-10 03:40:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 1.869770580296896) internal successors, (2771), 1482 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 2771 transitions. [2022-02-10 03:40:52,637 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 2771 transitions. Word has length 41 [2022-02-10 03:40:52,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:52,638 INFO L470 AbstractCegarLoop]: Abstraction has 1483 states and 2771 transitions. [2022-02-10 03:40:52,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9565217391304348) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:52,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 2771 transitions. [2022-02-10 03:40:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:52,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:52,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:52,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:52,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:52,862 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:52,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:52,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1440563780, now seen corresponding path program 20 times [2022-02-10 03:40:52,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:52,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124462641] [2022-02-10 03:40:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:52,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:53,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:53,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124462641] [2022-02-10 03:40:53,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124462641] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:53,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962043828] [2022-02-10 03:40:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:40:53,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:53,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:53,348 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) [2022-02-10 03:40:53,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-10 03:40:53,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:40:53,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:40:53,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:54,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:54,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-02-10 03:40:54,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:54,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:54,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:54,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:40:54,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:40:54,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:40:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:54,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:40:55,054 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:40:55,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-02-10 03:40:55,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:40:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:55,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962043828] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:40:55,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:40:55,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 45 [2022-02-10 03:40:55,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196191448] [2022-02-10 03:40:55,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:40:55,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:40:55,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:40:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:40:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1792, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:40:55,437 INFO L87 Difference]: Start difference. First operand 1483 states and 2771 transitions. Second operand has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 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) [2022-02-10 03:40:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:40:58,492 INFO L93 Difference]: Finished difference Result 3169 states and 5681 transitions. [2022-02-10 03:40:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-10 03:40:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 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 41 [2022-02-10 03:40:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:40:58,495 INFO L225 Difference]: With dead ends: 3169 [2022-02-10 03:40:58,496 INFO L226 Difference]: Without dead ends: 3138 [2022-02-10 03:40:58,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 69 SyntacticMatches, 21 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5245 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1846, Invalid=10586, Unknown=0, NotChecked=0, Total=12432 [2022-02-10 03:40:58,498 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 237 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1972 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:40:58,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 311 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 836 Invalid, 0 Unknown, 1972 Unchecked, 0.4s Time] [2022-02-10 03:40:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2022-02-10 03:40:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 1938. [2022-02-10 03:40:58,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 1.8554465668559628) internal successors, (3594), 1937 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:40:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 3594 transitions. [2022-02-10 03:40:58,523 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 3594 transitions. Word has length 41 [2022-02-10 03:40:58,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:40:58,523 INFO L470 AbstractCegarLoop]: Abstraction has 1938 states and 3594 transitions. [2022-02-10 03:40:58,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.9130434782608696) internal successors, (88), 45 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) [2022-02-10 03:40:58,523 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 3594 transitions. [2022-02-10 03:40:58,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:40:58,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:40:58,527 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:40:58,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-02-10 03:40:58,739 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,SelfDestructingSolverStorable32 [2022-02-10 03:40:58,739 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:40:58,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:40:58,740 INFO L85 PathProgramCache]: Analyzing trace with hash 335275204, now seen corresponding path program 21 times [2022-02-10 03:40:58,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:40:58,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81614743] [2022-02-10 03:40:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:40:58,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:40:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:40:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:40:59,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:40:59,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81614743] [2022-02-10 03:40:59,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81614743] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:40:59,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022940384] [2022-02-10 03:40:59,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-10 03:40:59,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:40:59,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:40:59,254 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) [2022-02-10 03:40:59,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-10 03:40:59,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-02-10 03:40:59,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:40:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:40:59,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:40:59,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:40:59,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-02-10 03:41:00,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:00,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:00,209 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:00,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 44 treesize of output 88 [2022-02-10 03:41:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:00,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:03,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:03,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:03,402 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:03,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 41 treesize of output 71 [2022-02-10 03:41:03,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:03,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022940384] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:03,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:03,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 54 [2022-02-10 03:41:03,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554094473] [2022-02-10 03:41:03,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:03,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-10 03:41:03,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:03,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-10 03:41:03,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2533, Unknown=0, NotChecked=0, Total=2970 [2022-02-10 03:41:03,806 INFO L87 Difference]: Start difference. First operand 1938 states and 3594 transitions. Second operand has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:08,085 INFO L93 Difference]: Finished difference Result 2690 states and 4682 transitions. [2022-02-10 03:41:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-10 03:41:08,085 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:41:08,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:08,088 INFO L225 Difference]: With dead ends: 2690 [2022-02-10 03:41:08,088 INFO L226 Difference]: Without dead ends: 2658 [2022-02-10 03:41:08,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 55 SyntacticMatches, 10 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4946 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2083, Invalid=12197, Unknown=0, NotChecked=0, Total=14280 [2022-02-10 03:41:08,090 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 412 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 2445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1970 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:41:08,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 808 Invalid, 2445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 439 Invalid, 0 Unknown, 1970 Unchecked, 0.2s Time] [2022-02-10 03:41:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2658 states. [2022-02-10 03:41:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2658 to 2016. [2022-02-10 03:41:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 1.8575682382133996) internal successors, (3743), 2015 states have internal predecessors, (3743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3743 transitions. [2022-02-10 03:41:08,111 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3743 transitions. Word has length 41 [2022-02-10 03:41:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:08,111 INFO L470 AbstractCegarLoop]: Abstraction has 2016 states and 3743 transitions. [2022-02-10 03:41:08,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.8909090909090909) internal successors, (104), 54 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3743 transitions. [2022-02-10 03:41:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:08,114 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:08,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:41:08,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-10 03:41:08,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:08,322 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:08,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash 282305122, now seen corresponding path program 22 times [2022-02-10 03:41:08,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:08,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876365316] [2022-02-10 03:41:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:08,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:08,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:08,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:08,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876365316] [2022-02-10 03:41:08,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876365316] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:08,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278318227] [2022-02-10 03:41:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-10 03:41:08,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:08,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:08,937 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) [2022-02-10 03:41:08,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-10 03:41:08,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-10 03:41:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:41:08,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:09,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:09,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-02-10 03:41:09,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:09,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:09,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:09,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:09,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:09,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:41:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:09,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:10,468 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:41:10,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-02-10 03:41:11,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:11,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278318227] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:11,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:11,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 48 [2022-02-10 03:41:11,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471324527] [2022-02-10 03:41:11,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:11,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-10 03:41:11,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-10 03:41:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2052, Unknown=0, NotChecked=0, Total=2352 [2022-02-10 03:41:11,175 INFO L87 Difference]: Start difference. First operand 2016 states and 3743 transitions. Second operand has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:11,994 INFO L93 Difference]: Finished difference Result 3332 states and 6062 transitions. [2022-02-10 03:41:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-10 03:41:11,995 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:41:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:12,000 INFO L225 Difference]: With dead ends: 3332 [2022-02-10 03:41:12,000 INFO L226 Difference]: Without dead ends: 3326 [2022-02-10 03:41:12,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=495, Invalid=3537, Unknown=0, NotChecked=0, Total=4032 [2022-02-10 03:41:12,001 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 161 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-10 03:41:12,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 350 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 644 Invalid, 0 Unknown, 557 Unchecked, 0.3s Time] [2022-02-10 03:41:12,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2022-02-10 03:41:12,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2028. [2022-02-10 03:41:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 1.8539713862851506) internal successors, (3758), 2027 states have internal predecessors, (3758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 3758 transitions. [2022-02-10 03:41:12,033 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 3758 transitions. Word has length 41 [2022-02-10 03:41:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:12,033 INFO L470 AbstractCegarLoop]: Abstraction has 2028 states and 3758 transitions. [2022-02-10 03:41:12,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.8979591836734695) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 3758 transitions. [2022-02-10 03:41:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:12,037 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:12,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:41:12,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-10 03:41:12,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:12,257 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash 748856380, now seen corresponding path program 23 times [2022-02-10 03:41:12,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:12,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908562001] [2022-02-10 03:41:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:12,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-10 03:41:12,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:12,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908562001] [2022-02-10 03:41:12,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908562001] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:12,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497520589] [2022-02-10 03:41:12,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-10 03:41:12,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:12,733 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) [2022-02-10 03:41:12,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-10 03:41:12,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-10 03:41:12,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:12,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-10 03:41:12,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:13,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:13,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-02-10 03:41:13,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:13,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:13,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:13,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:13,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:13,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-02-10 03:41:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:13,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:14,365 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:41:14,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 114 [2022-02-10 03:41:14,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:14,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497520589] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:14,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:14,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 19] total 44 [2022-02-10 03:41:14,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285151985] [2022-02-10 03:41:14,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:14,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-10 03:41:14,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:14,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-10 03:41:14,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1705, Unknown=0, NotChecked=0, Total=1980 [2022-02-10 03:41:14,707 INFO L87 Difference]: Start difference. First operand 2028 states and 3758 transitions. Second operand has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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) [2022-02-10 03:41:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:16,789 INFO L93 Difference]: Finished difference Result 3534 states and 6358 transitions. [2022-02-10 03:41:16,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-10 03:41:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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 41 [2022-02-10 03:41:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:16,794 INFO L225 Difference]: With dead ends: 3534 [2022-02-10 03:41:16,794 INFO L226 Difference]: Without dead ends: 3507 [2022-02-10 03:41:16,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2659 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=992, Invalid=6664, Unknown=0, NotChecked=0, Total=7656 [2022-02-10 03:41:16,795 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 2870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1805 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-10 03:41:16,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 643 Invalid, 2870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1008 Invalid, 0 Unknown, 1805 Unchecked, 0.4s Time] [2022-02-10 03:41:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-02-10 03:41:16,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 1943. [2022-02-10 03:41:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1943 states, 1942 states have (on average 1.83264675592173) internal successors, (3559), 1942 states have internal predecessors, (3559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:16,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1943 states to 1943 states and 3559 transitions. [2022-02-10 03:41:16,821 INFO L78 Accepts]: Start accepts. Automaton has 1943 states and 3559 transitions. Word has length 41 [2022-02-10 03:41:16,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:16,822 INFO L470 AbstractCegarLoop]: Abstraction has 1943 states and 3559 transitions. [2022-02-10 03:41:16,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 44 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) [2022-02-10 03:41:16,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1943 states and 3559 transitions. [2022-02-10 03:41:16,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:16,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:16,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:41:16,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-10 03:41:17,024 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,SelfDestructingSolverStorable35 [2022-02-10 03:41:17,024 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:17,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:17,025 INFO L85 PathProgramCache]: Analyzing trace with hash -187307664, now seen corresponding path program 24 times [2022-02-10 03:41:17,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:17,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771899341] [2022-02-10 03:41:17,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:17,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:17,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:17,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771899341] [2022-02-10 03:41:17,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771899341] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:17,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965313236] [2022-02-10 03:41:17,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-10 03:41:17,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:17,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:17,506 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) [2022-02-10 03:41:17,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-10 03:41:17,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-10 03:41:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:17,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:41:17,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:18,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:18,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 48 [2022-02-10 03:41:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:18,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:18,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:18,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2022-02-10 03:41:18,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:18,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:20,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:20,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:20,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:20,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:20,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:20,168 INFO L353 Elim1Store]: treesize reduction 16, result has 78.1 percent of original size [2022-02-10 03:41:20,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 86 [2022-02-10 03:41:20,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:20,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965313236] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:20,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:20,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 52 [2022-02-10 03:41:20,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39206883] [2022-02-10 03:41:20,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:20,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-10 03:41:20,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:20,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-10 03:41:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2327, Unknown=0, NotChecked=0, Total=2756 [2022-02-10 03:41:20,707 INFO L87 Difference]: Start difference. First operand 1943 states and 3559 transitions. Second operand has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:23,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:23,352 INFO L93 Difference]: Finished difference Result 3697 states and 6490 transitions. [2022-02-10 03:41:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-10 03:41:23,352 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-02-10 03:41:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:23,357 INFO L225 Difference]: With dead ends: 3697 [2022-02-10 03:41:23,357 INFO L226 Difference]: Without dead ends: 3652 [2022-02-10 03:41:23,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3759 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1751, Invalid=8755, Unknown=0, NotChecked=0, Total=10506 [2022-02-10 03:41:23,359 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 239 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1561 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:41:23,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 416 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 489 Invalid, 0 Unknown, 1561 Unchecked, 0.2s Time] [2022-02-10 03:41:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3652 states. [2022-02-10 03:41:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3652 to 2263. [2022-02-10 03:41:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 1.8311229000884173) internal successors, (4142), 2262 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:23,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4142 transitions. [2022-02-10 03:41:23,385 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4142 transitions. Word has length 41 [2022-02-10 03:41:23,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:23,385 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 4142 transitions. [2022-02-10 03:41:23,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:23,385 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4142 transitions. [2022-02-10 03:41:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:23,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:23,388 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:41:23,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-02-10 03:41:23,588 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,SelfDestructingSolverStorable36 [2022-02-10 03:41:23,588 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1054582392, now seen corresponding path program 25 times [2022-02-10 03:41:23,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:23,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589251014] [2022-02-10 03:41:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:23,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:24,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:24,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589251014] [2022-02-10 03:41:24,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589251014] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:24,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082881337] [2022-02-10 03:41:24,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-10 03:41:24,191 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:24,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:24,192 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) [2022-02-10 03:41:24,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-10 03:41:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:24,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjunts are in the unsatisfiable core [2022-02-10 03:41:24,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:24,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:24,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2022-02-10 03:41:25,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:25,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:25,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:25,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:25,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-02-10 03:41:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:25,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-10 03:41:26,093 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-02-10 03:41:26,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-02-10 03:41:27,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-02-10 03:41:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:27,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082881337] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-10 03:41:27,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-10 03:41:27,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 19] total 45 [2022-02-10 03:41:27,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398084744] [2022-02-10 03:41:27,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-10 03:41:27,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-10 03:41:27,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-10 03:41:27,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-10 03:41:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1794, Unknown=0, NotChecked=0, Total=2070 [2022-02-10 03:41:27,431 INFO L87 Difference]: Start difference. First operand 2263 states and 4142 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) [2022-02-10 03:41:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-10 03:41:28,550 INFO L93 Difference]: Finished difference Result 4222 states and 7632 transitions. [2022-02-10 03:41:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-10 03:41:28,550 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 41 [2022-02-10 03:41:28,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-10 03:41:28,555 INFO L225 Difference]: With dead ends: 4222 [2022-02-10 03:41:28,555 INFO L226 Difference]: Without dead ends: 4195 [2022-02-10 03:41:28,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 60 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=619, Invalid=3803, Unknown=0, NotChecked=0, Total=4422 [2022-02-10 03:41:28,556 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 166 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 639 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-10 03:41:28,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 485 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 550 Invalid, 0 Unknown, 639 Unchecked, 0.2s Time] [2022-02-10 03:41:28,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2022-02-10 03:41:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 2319. [2022-02-10 03:41:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2319 states, 2318 states have (on average 1.8321829163071612) internal successors, (4247), 2318 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-10 03:41:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2319 states to 2319 states and 4247 transitions. [2022-02-10 03:41:28,582 INFO L78 Accepts]: Start accepts. Automaton has 2319 states and 4247 transitions. Word has length 41 [2022-02-10 03:41:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-10 03:41:28,582 INFO L470 AbstractCegarLoop]: Abstraction has 2319 states and 4247 transitions. [2022-02-10 03:41:28,583 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) [2022-02-10 03:41:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2319 states and 4247 transitions. [2022-02-10 03:41:28,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-10 03:41:28,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-10 03:41:28,585 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-10 03:41:28,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-10 03:41:28,785 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,SelfDestructingSolverStorable37 [2022-02-10 03:41:28,786 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-02-10 03:41:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-10 03:41:28,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1068261026, now seen corresponding path program 26 times [2022-02-10 03:41:28,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-10 03:41:28,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119947075] [2022-02-10 03:41:28,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-10 03:41:28,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-10 03:41:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-10 03:41:29,378 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-10 03:41:29,378 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-10 03:41:29,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119947075] [2022-02-10 03:41:29,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119947075] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-10 03:41:29,378 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299971549] [2022-02-10 03:41:29,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-10 03:41:29,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-10 03:41:29,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-10 03:41:29,379 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) [2022-02-10 03:41:29,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-10 03:41:29,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-10 03:41:29,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-10 03:41:29,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-10 03:41:29,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-10 03:41:30,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:30,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-02-10 03:41:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-10 03:41:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-02-10 03:41:30,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-10 03:41:30,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2022-02-10 03:41:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-10 03:41:31,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-02-10 03:53:04,111 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-02-10 03:53:04,113 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-02-10 03:53:04,119 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-10 03:53:04,119 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 [2022-02-10 03:53:04,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-02-10 03:53:04,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-02-10 03:53:04,319 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 6ms.. [2022-02-10 03:53:04,321 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-02-10 03:53:04,321 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-02-10 03:53:04,322 INFO L732 BasicCegarLoop]: Path program histogram: [26, 11, 1, 1] [2022-02-10 03:53:04,324 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-10 03:53:04,324 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-10 03:53:04,326 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.02 03:53:04 BasicIcfg [2022-02-10 03:53:04,326 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-10 03:53:04,326 INFO L158 Benchmark]: Toolchain (without parser) took 837101.13ms. Allocated memory was 176.2MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 137.9MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 3.0GB. Max. memory is 8.0GB. [2022-02-10 03:53:04,326 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.17ms. Allocated memory is still 176.2MB. Free memory is still 139.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:53:04,326 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.13ms. Allocated memory is still 176.2MB. Free memory was 137.8MB in the beginning and 136.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-10 03:53:04,326 INFO L158 Benchmark]: Boogie Preprocessor took 19.80ms. Allocated memory is still 176.2MB. Free memory was 136.3MB in the beginning and 135.3MB in the end (delta: 937.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-10 03:53:04,327 INFO L158 Benchmark]: RCFGBuilder took 277.19ms. Allocated memory is still 176.2MB. Free memory was 135.3MB in the beginning and 125.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-10 03:53:04,327 INFO L158 Benchmark]: TraceAbstraction took 836773.47ms. Allocated memory was 176.2MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 125.4MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2022-02-10 03:53:04,327 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 0.17ms. Allocated memory is still 176.2MB. Free memory is still 139.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.13ms. Allocated memory is still 176.2MB. Free memory was 137.8MB in the beginning and 136.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.80ms. Allocated memory is still 176.2MB. Free memory was 136.3MB in the beginning and 135.3MB in the end (delta: 937.0kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 277.19ms. Allocated memory is still 176.2MB. Free memory was 135.3MB in the beginning and 125.9MB in the end (delta: 9.4MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 836773.47ms. Allocated memory was 176.2MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 125.4MB in the beginning and 3.7GB in the end (delta: -3.6GB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 0 - 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 6ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 6ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 42 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 836.7s, OverallIterations: 39, TraceHistogramMax: 4, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.8s, AutomataDifference: 45.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, PartialOrderReductionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5282 SdHoareTripleChecker+Valid, 6.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5282 mSDsluCounter, 10516 SdHoareTripleChecker+Invalid, 5.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 23345 IncrementalHoareTripleChecker+Unchecked, 11340 mSDsCounter, 1173 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12975 IncrementalHoareTripleChecker+Invalid, 37493 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1173 mSolverCounterUnsat, 1082 mSDtfsCounter, 12975 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4136 GetRequests, 1988 SyntacticMatches, 178 SemanticMatches, 1970 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 58145 ImplicationChecksByTransitivity, 55.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=112297occurred in iteration=0, InterpolantAutomatonStates: 1437, 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, 38 MinimizatonAttempts, 95443 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 79.7s InterpolantComputationTime, 2625 NumberOfCodeBlocks, 2612 NumberOfCodeBlocksAsserted, 127 NumberOfCheckSat, 3721 ConstructedInterpolants, 816 QuantifiedInterpolants, 57941 SizeOfPredicates, 642 NumberOfNonLiveVariables, 2664 ConjunctsInSsa, 876 ConjunctsInUnsatCore, 106 InterpolantComputations, 5 PerfectInterpolantSequences, 363/2459 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