/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 16:38:58,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 16:38:58,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 16:38:59,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 16:38:59,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 16:38:59,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 16:38:59,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 16:38:59,108 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-15 16:38:59,134 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 16:38:59,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 16:38:59,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-15 16:38:59,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-15 16:38:59,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 16:38:59,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 16:38:59,137 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 16:38:59,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 16:38:59,137 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 16:38:59,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 16:38:59,138 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 16:38:59,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 16:38:59,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 16:38:59,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 16:38:59,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 16:38:59,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 16:38:59,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 16:38:59,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 16:38:59,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 16:38:59,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:38:59,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 16:38:59,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-15 16:38:59,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 16:38:59,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 16:38:59,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 16:38:59,141 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-15 16:38:59,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 16:38:59,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 16:38:59,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 16:38:59,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 16:38:59,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 16:38:59,384 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 16:38:59,385 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 16:38:59,386 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl [2022-03-15 16:38:59,386 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum.wvr.bpl' [2022-03-15 16:38:59,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 16:38:59,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 16:38:59,411 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 16:38:59,411 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 16:38:59,411 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 16:38:59,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,433 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 16:38:59,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 16:38:59,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 16:38:59,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 16:38:59,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 16:38:59,442 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 16:38:59,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 16:38:59,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 16:38:59,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 16:38:59,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/1) ... [2022-03-15 16:38:59,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 16:38:59,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:38:59,488 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 16:38:59,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 16:38:59,523 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 16:38:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 16:38:59,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 16:38:59,523 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 16:38:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 16:38:59,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 16:38:59,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 16:38:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 16:38:59,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 16:38:59,524 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 16:38:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 16:38:59,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 16:38:59,525 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 16:38:59,561 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 16:38:59,562 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 16:38:59,671 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 16:38:59,677 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 16:38:59,677 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 16:38:59,679 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:38:59 BoogieIcfgContainer [2022-03-15 16:38:59,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 16:38:59,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 16:38:59,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 16:38:59,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 16:38:59,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 04:38:59" (1/2) ... [2022-03-15 16:38:59,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b58088c and model type array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 04:38:59, skipping insertion in model container [2022-03-15 16:38:59,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 04:38:59" (2/2) ... [2022-03-15 16:38:59,687 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum.wvr.bpl [2022-03-15 16:38:59,694 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 16:38:59,694 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-15 16:38:59,694 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 16:38:59,694 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 16:38:59,748 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 16:38:59,796 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 16:38:59,803 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 16:38:59,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 16:38:59,816 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-03-15 16:38:59,874 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:59,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:38:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 16:38:59,891 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:38:59,891 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:38:59,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:38:59,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:38:59,896 INFO L85 PathProgramCache]: Analyzing trace with hash 148747361, now seen corresponding path program 1 times [2022-03-15 16:38:59,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:38:59,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772368203] [2022-03-15 16:38:59,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:38:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:00,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:00,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772368203] [2022-03-15 16:39:00,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772368203] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:39:00,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:39:00,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 16:39:00,105 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706763992] [2022-03-15 16:39:00,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:39:00,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 16:39:00,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 16:39:00,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:39:00,132 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:00,183 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-03-15 16:39:00,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 16:39:00,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 16:39:00,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:00,197 INFO L225 Difference]: With dead ends: 298 [2022-03-15 16:39:00,197 INFO L226 Difference]: Without dead ends: 283 [2022-03-15 16:39:00,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 16:39:00,202 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:00,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:39:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-15 16:39:00,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-03-15 16:39:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 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) [2022-03-15 16:39:00,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-03-15 16:39:00,289 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-03-15 16:39:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:00,290 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-03-15 16:39:00,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,291 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-03-15 16:39:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:39:00,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:00,293 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] [2022-03-15 16:39:00,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 16:39:00,293 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:00,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash 191403910, now seen corresponding path program 1 times [2022-03-15 16:39:00,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:00,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207682813] [2022-03-15 16:39:00,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:00,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:00,344 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:00,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207682813] [2022-03-15 16:39:00,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207682813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:39:00,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:39:00,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:39:00,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809756783] [2022-03-15 16:39:00,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:39:00,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 16:39:00,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 16:39:00,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-15 16:39:00,347 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:00,400 INFO L93 Difference]: Finished difference Result 249 states and 716 transitions. [2022-03-15 16:39:00,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 16:39:00,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:39:00,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:00,403 INFO L225 Difference]: With dead ends: 249 [2022-03-15 16:39:00,403 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 16:39:00,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:39:00,405 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:00,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:39:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 16:39:00,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 224. [2022-03-15 16:39:00,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.89237668161435) internal successors, (645), 223 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 645 transitions. [2022-03-15 16:39:00,423 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 645 transitions. Word has length 21 [2022-03-15 16:39:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:00,423 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 645 transitions. [2022-03-15 16:39:00,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,424 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 645 transitions. [2022-03-15 16:39:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 16:39:00,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:00,426 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] [2022-03-15 16:39:00,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 16:39:00,426 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:00,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:00,427 INFO L85 PathProgramCache]: Analyzing trace with hash 364622328, now seen corresponding path program 1 times [2022-03-15 16:39:00,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:00,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30476363] [2022-03-15 16:39:00,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:00,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:00,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:00,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30476363] [2022-03-15 16:39:00,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30476363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 16:39:00,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 16:39:00,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 16:39:00,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678532678] [2022-03-15 16:39:00,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-15 16:39:00,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 16:39:00,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 16:39:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-15 16:39:00,489 INFO L87 Difference]: Start difference. First operand 224 states and 645 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:00,537 INFO L93 Difference]: Finished difference Result 332 states and 966 transitions. [2022-03-15 16:39:00,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 16:39:00,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 16:39:00,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:00,540 INFO L225 Difference]: With dead ends: 332 [2022-03-15 16:39:00,540 INFO L226 Difference]: Without dead ends: 332 [2022-03-15 16:39:00,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 16:39:00,542 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:00,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 16:39:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-15 16:39:00,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 260. [2022-03-15 16:39:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.9034749034749034) internal successors, (752), 259 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 752 transitions. [2022-03-15 16:39:00,560 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 752 transitions. Word has length 21 [2022-03-15 16:39:00,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:00,561 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 752 transitions. [2022-03-15 16:39:00,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 752 transitions. [2022-03-15 16:39:00,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:39:00,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:00,563 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, 1] [2022-03-15 16:39:00,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 16:39:00,564 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -164446029, now seen corresponding path program 1 times [2022-03-15 16:39:00,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:00,565 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218386234] [2022-03-15 16:39:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:00,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:01,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:01,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:01,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218386234] [2022-03-15 16:39:01,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218386234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:01,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714641076] [2022-03-15 16:39:01,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:01,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:01,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:01,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:01,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 16:39:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:01,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:39:01,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:01,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-03-15 16:39:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:01,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:01,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:01,778 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 17 treesize of output 22 [2022-03-15 16:39:01,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:01,786 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 13 treesize of output 18 [2022-03-15 16:39:01,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:39:01,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:39:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:01,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714641076] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:01,933 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:01,933 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-15 16:39:01,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555286809] [2022-03-15 16:39:01,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:01,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:39:01,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:39:01,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:39:01,938 INFO L87 Difference]: Start difference. First operand 260 states and 752 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:02,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:02,393 INFO L93 Difference]: Finished difference Result 535 states and 1542 transitions. [2022-03-15 16:39:02,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:39:02,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:39:02,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:02,399 INFO L225 Difference]: With dead ends: 535 [2022-03-15 16:39:02,399 INFO L226 Difference]: Without dead ends: 520 [2022-03-15 16:39:02,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-03-15 16:39:02,404 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 252 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:02,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 99 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:02,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-03-15 16:39:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 346. [2022-03-15 16:39:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.8956521739130436) internal successors, (999), 345 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 999 transitions. [2022-03-15 16:39:02,435 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 999 transitions. Word has length 24 [2022-03-15 16:39:02,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:02,435 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 999 transitions. [2022-03-15 16:39:02,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 999 transitions. [2022-03-15 16:39:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:39:02,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:02,439 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, 1] [2022-03-15 16:39:02,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 16:39:02,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:02,657 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:02,658 INFO L85 PathProgramCache]: Analyzing trace with hash -463670379, now seen corresponding path program 2 times [2022-03-15 16:39:02,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:02,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749211425] [2022-03-15 16:39:02,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:02,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:02,988 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:02,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749211425] [2022-03-15 16:39:02,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749211425] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:02,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948215196] [2022-03-15 16:39:02,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:02,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:02,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:02,990 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:03,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 16:39:03,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:03,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:39:03,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:03,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:03,273 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 73 [2022-03-15 16:39:03,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:03,282 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 20 treesize of output 25 [2022-03-15 16:39:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:03,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:03,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:03,536 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 17 treesize of output 22 [2022-03-15 16:39:03,543 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:03,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-15 16:39:03,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:39:03,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:39:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:03,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948215196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:03,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:03,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-15 16:39:03,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079598058] [2022-03-15 16:39:03,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:03,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 16:39:03,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 16:39:03,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-03-15 16:39:03,680 INFO L87 Difference]: Start difference. First operand 346 states and 999 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:05,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:05,738 INFO L93 Difference]: Finished difference Result 1430 states and 4135 transitions. [2022-03-15 16:39:05,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 16:39:05,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:39:05,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:05,746 INFO L225 Difference]: With dead ends: 1430 [2022-03-15 16:39:05,747 INFO L226 Difference]: Without dead ends: 1400 [2022-03-15 16:39:05,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=647, Invalid=2215, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:39:05,748 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 609 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:05,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 191 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:39:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2022-03-15 16:39:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 473. [2022-03-15 16:39:05,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9661016949152543) internal successors, (1400), 472 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:05,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1400 transitions. [2022-03-15 16:39:05,771 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1400 transitions. Word has length 24 [2022-03-15 16:39:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:05,771 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1400 transitions. [2022-03-15 16:39:05,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1400 transitions. [2022-03-15 16:39:05,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:39:05,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:05,773 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, 1] [2022-03-15 16:39:05,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-15 16:39:05,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:05,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1613103477, now seen corresponding path program 3 times [2022-03-15 16:39:05,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:05,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032418490] [2022-03-15 16:39:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:06,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:06,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:06,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032418490] [2022-03-15 16:39:06,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032418490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:06,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051064246] [2022-03-15 16:39:06,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:06,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:06,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:06,192 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:06,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 16:39:06,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:39:06,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:06,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 16:39:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:06,402 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 29 treesize of output 25 [2022-03-15 16:39:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:06,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:06,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:06,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2022-03-15 16:39:06,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:06,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-15 16:39:06,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:39:06,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:39:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:06,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051064246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:06,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:06,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-15 16:39:06,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284372800] [2022-03-15 16:39:06,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:06,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:06,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:06,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:06,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:06,692 INFO L87 Difference]: Start difference. First operand 473 states and 1400 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:07,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:07,159 INFO L93 Difference]: Finished difference Result 745 states and 2174 transitions. [2022-03-15 16:39:07,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 16:39:07,160 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:39:07,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:07,164 INFO L225 Difference]: With dead ends: 745 [2022-03-15 16:39:07,164 INFO L226 Difference]: Without dead ends: 730 [2022-03-15 16:39:07,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-15 16:39:07,165 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:07,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 148 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-03-15 16:39:07,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 489. [2022-03-15 16:39:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 2.9508196721311477) internal successors, (1440), 488 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:07,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1440 transitions. [2022-03-15 16:39:07,185 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1440 transitions. Word has length 24 [2022-03-15 16:39:07,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:07,185 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1440 transitions. [2022-03-15 16:39:07,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1440 transitions. [2022-03-15 16:39:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:39:07,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:07,187 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, 1] [2022-03-15 16:39:07,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:07,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:07,409 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:07,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:07,410 INFO L85 PathProgramCache]: Analyzing trace with hash -882860491, now seen corresponding path program 4 times [2022-03-15 16:39:07,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:07,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305397129] [2022-03-15 16:39:07,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:07,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:07,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:07,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305397129] [2022-03-15 16:39:07,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305397129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:07,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141738104] [2022-03-15 16:39:07,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:07,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:07,649 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:07,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 16:39:07,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:07,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:07,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:39:07,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:07,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:07,856 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 28 [2022-03-15 16:39:07,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:07,864 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 20 treesize of output 25 [2022-03-15 16:39:07,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:08,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:08,131 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 17 treesize of output 22 [2022-03-15 16:39:08,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:08,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-15 16:39:08,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:39:08,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:39:08,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:08,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141738104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:08,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:08,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-03-15 16:39:08,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426530853] [2022-03-15 16:39:08,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 16:39:08,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 16:39:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:39:08,287 INFO L87 Difference]: Start difference. First operand 489 states and 1440 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:08,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:08,671 INFO L93 Difference]: Finished difference Result 785 states and 2319 transitions. [2022-03-15 16:39:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:39:08,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:39:08,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:08,676 INFO L225 Difference]: With dead ends: 785 [2022-03-15 16:39:08,676 INFO L226 Difference]: Without dead ends: 770 [2022-03-15 16:39:08,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-03-15 16:39:08,677 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:08,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 152 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 313 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-03-15 16:39:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2022-03-15 16:39:08,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 504. [2022-03-15 16:39:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 2.9761431411530817) internal successors, (1497), 503 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:08,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1497 transitions. [2022-03-15 16:39:08,695 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1497 transitions. Word has length 24 [2022-03-15 16:39:08,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:08,696 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1497 transitions. [2022-03-15 16:39:08,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1497 transitions. [2022-03-15 16:39:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:39:08,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:08,699 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, 1] [2022-03-15 16:39:08,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:08,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:08,907 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash -207846031, now seen corresponding path program 5 times [2022-03-15 16:39:08,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:08,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65392908] [2022-03-15 16:39:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:08,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:09,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:09,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:09,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65392908] [2022-03-15 16:39:09,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65392908] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:09,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729033689] [2022-03-15 16:39:09,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:09,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:09,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:09,192 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 16:39:09,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:39:09,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 16:39:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:09,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:09,390 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 21 treesize of output 25 [2022-03-15 16:39:09,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:09,398 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 31 [2022-03-15 16:39:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:09,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:09,790 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:09,790 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 17 treesize of output 22 [2022-03-15 16:39:09,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:09,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-15 16:39:09,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:39:09,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:39:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:09,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729033689] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:09,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:09,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 23 [2022-03-15 16:39:09,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828875530] [2022-03-15 16:39:09,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:09,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 16:39:09,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 16:39:09,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2022-03-15 16:39:09,948 INFO L87 Difference]: Start difference. First operand 504 states and 1497 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:14,599 INFO L93 Difference]: Finished difference Result 1743 states and 5052 transitions. [2022-03-15 16:39:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 16:39:14,599 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 24 [2022-03-15 16:39:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:14,608 INFO L225 Difference]: With dead ends: 1743 [2022-03-15 16:39:14,608 INFO L226 Difference]: Without dead ends: 1698 [2022-03-15 16:39:14,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2413, Invalid=8929, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 16:39:14,611 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 450 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:14,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 352 Invalid, 1962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1461 Invalid, 0 Unknown, 312 Unchecked, 0.9s Time] [2022-03-15 16:39:14,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-03-15 16:39:14,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 537. [2022-03-15 16:39:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.0167910447761193) internal successors, (1617), 536 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:14,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1617 transitions. [2022-03-15 16:39:14,633 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1617 transitions. Word has length 24 [2022-03-15 16:39:14,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:14,633 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1617 transitions. [2022-03-15 16:39:14,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:14,633 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1617 transitions. [2022-03-15 16:39:14,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 16:39:14,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:14,635 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, 1] [2022-03-15 16:39:14,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:14,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:14,851 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:14,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1216410503, now seen corresponding path program 6 times [2022-03-15 16:39:14,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:14,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430282213] [2022-03-15 16:39:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:15,076 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:15,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430282213] [2022-03-15 16:39:15,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430282213] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:15,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21658467] [2022-03-15 16:39:15,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:15,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:15,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:15,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:15,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 16:39:15,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:39:15,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:15,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 16:39:15,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:15,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:15,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 29 [2022-03-15 16:39:15,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:39:15,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:15,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:15,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:15,517 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 17 treesize of output 22 [2022-03-15 16:39:15,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:15,522 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 13 treesize of output 18 [2022-03-15 16:39:15,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-03-15 16:39:15,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-15 16:39:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:15,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21658467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:15,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:15,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-03-15 16:39:15,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720296025] [2022-03-15 16:39:15,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 16:39:15,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 16:39:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-15 16:39:15,651 INFO L87 Difference]: Start difference. First operand 537 states and 1617 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:17,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:17,656 INFO L93 Difference]: Finished difference Result 1448 states and 4322 transitions. [2022-03-15 16:39:17,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 16:39:17,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 16:39:17,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:17,664 INFO L225 Difference]: With dead ends: 1448 [2022-03-15 16:39:17,664 INFO L226 Difference]: Without dead ends: 1421 [2022-03-15 16:39:17,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=696, Invalid=2060, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 16:39:17,666 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 269 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:17,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 224 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 785 Invalid, 0 Unknown, 159 Unchecked, 0.5s Time] [2022-03-15 16:39:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2022-03-15 16:39:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 542. [2022-03-15 16:39:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.0129390018484288) internal successors, (1630), 541 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1630 transitions. [2022-03-15 16:39:17,698 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1630 transitions. Word has length 24 [2022-03-15 16:39:17,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:17,698 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1630 transitions. [2022-03-15 16:39:17,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1630 transitions. [2022-03-15 16:39:17,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:17,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:17,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:17,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:17,915 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 2091300250, now seen corresponding path program 7 times [2022-03-15 16:39:17,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:17,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27212956] [2022-03-15 16:39:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:17,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:17,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:17,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27212956] [2022-03-15 16:39:17,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27212956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:17,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384901035] [2022-03-15 16:39:17,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:17,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:17,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:17,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:17,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 16:39:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:18,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:18,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:18,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:18,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384901035] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:18,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:18,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:39:18,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109284033] [2022-03-15 16:39:18,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:18,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:39:18,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:18,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:39:18,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:39:18,219 INFO L87 Difference]: Start difference. First operand 542 states and 1630 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:19,053 INFO L93 Difference]: Finished difference Result 2382 states and 6924 transitions. [2022-03-15 16:39:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:39:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:19,063 INFO L225 Difference]: With dead ends: 2382 [2022-03-15 16:39:19,063 INFO L226 Difference]: Without dead ends: 2382 [2022-03-15 16:39:19,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 16:39:19,065 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 379 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:19,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 226 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:19,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2382 states. [2022-03-15 16:39:19,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2382 to 685. [2022-03-15 16:39:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 684 states have (on average 3.1827485380116958) internal successors, (2177), 684 states have internal predecessors, (2177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 2177 transitions. [2022-03-15 16:39:19,094 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 2177 transitions. Word has length 27 [2022-03-15 16:39:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:19,094 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 2177 transitions. [2022-03-15 16:39:19,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 2177 transitions. [2022-03-15 16:39:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:19,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:19,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:19,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:19,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:19,319 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:19,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:19,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1715146358, now seen corresponding path program 8 times [2022-03-15 16:39:19,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:19,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270596637] [2022-03-15 16:39:19,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:19,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:19,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:19,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270596637] [2022-03-15 16:39:19,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270596637] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:19,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866949808] [2022-03-15 16:39:19,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:19,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:19,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:19,368 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) [2022-03-15 16:39:19,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 16:39:19,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:19,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:19,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:19,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:19,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:19,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866949808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:19,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:19,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:39:19,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245299135] [2022-03-15 16:39:19,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:19,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:39:19,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:19,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:39:19,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:39:19,635 INFO L87 Difference]: Start difference. First operand 685 states and 2177 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:21,640 INFO L93 Difference]: Finished difference Result 3706 states and 10706 transitions. [2022-03-15 16:39:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-15 16:39:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:21,657 INFO L225 Difference]: With dead ends: 3706 [2022-03-15 16:39:21,657 INFO L226 Difference]: Without dead ends: 3706 [2022-03-15 16:39:21,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4308 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:39:21,661 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 638 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:21,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 294 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 16:39:21,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3706 states. [2022-03-15 16:39:21,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3706 to 689. [2022-03-15 16:39:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 3.193313953488372) internal successors, (2197), 688 states have internal predecessors, (2197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:21,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 2197 transitions. [2022-03-15 16:39:21,698 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 2197 transitions. Word has length 27 [2022-03-15 16:39:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:21,699 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 2197 transitions. [2022-03-15 16:39:21,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:21,699 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 2197 transitions. [2022-03-15 16:39:21,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:21,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:21,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:21,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:21,922 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,SelfDestructingSolverStorable10 [2022-03-15 16:39:21,923 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:21,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1909047026, now seen corresponding path program 9 times [2022-03-15 16:39:21,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:21,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410553121] [2022-03-15 16:39:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:21,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:21,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:21,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:21,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410553121] [2022-03-15 16:39:21,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410553121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:21,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163702405] [2022-03-15 16:39:21,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:21,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:21,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:21,974 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:21,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 16:39:22,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:39:22,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:22,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:22,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:22,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163702405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:22,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:22,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:39:22,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014623166] [2022-03-15 16:39:22,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:22,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:39:22,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:22,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:39:22,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:39:22,226 INFO L87 Difference]: Start difference. First operand 689 states and 2197 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:23,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:23,202 INFO L93 Difference]: Finished difference Result 3048 states and 8766 transitions. [2022-03-15 16:39:23,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:39:23,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:23,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:23,215 INFO L225 Difference]: With dead ends: 3048 [2022-03-15 16:39:23,216 INFO L226 Difference]: Without dead ends: 3048 [2022-03-15 16:39:23,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 16:39:23,217 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 517 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:23,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 235 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2022-03-15 16:39:23,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 679. [2022-03-15 16:39:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 678 states have (on average 3.1814159292035398) internal successors, (2157), 678 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 2157 transitions. [2022-03-15 16:39:23,247 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 2157 transitions. Word has length 27 [2022-03-15 16:39:23,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:23,247 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 2157 transitions. [2022-03-15 16:39:23,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:23,248 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 2157 transitions. [2022-03-15 16:39:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:23,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:23,249 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, 1, 1, 1, 1] [2022-03-15 16:39:23,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:23,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:23,463 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:23,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:23,463 INFO L85 PathProgramCache]: Analyzing trace with hash 2064323803, now seen corresponding path program 1 times [2022-03-15 16:39:23,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:23,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4433792] [2022-03-15 16:39:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:23,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:23,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:23,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4433792] [2022-03-15 16:39:23,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4433792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:23,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055149911] [2022-03-15 16:39:23,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:23,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:23,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:23,504 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:23,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 16:39:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:39:23,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:23,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:23,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055149911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:23,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:23,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:39:23,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187159704] [2022-03-15 16:39:23,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:23,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:39:23,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:23,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:39:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:39:23,671 INFO L87 Difference]: Start difference. First operand 679 states and 2157 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:23,822 INFO L93 Difference]: Finished difference Result 1471 states and 4421 transitions. [2022-03-15 16:39:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 16:39:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:23,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:23,831 INFO L225 Difference]: With dead ends: 1471 [2022-03-15 16:39:23,832 INFO L226 Difference]: Without dead ends: 1453 [2022-03-15 16:39:23,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:23,832 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 226 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:23,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 64 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:39:23,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-03-15 16:39:23,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 959. [2022-03-15 16:39:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.2515657620041756) internal successors, (3115), 958 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3115 transitions. [2022-03-15 16:39:23,860 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3115 transitions. Word has length 27 [2022-03-15 16:39:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:23,860 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 3115 transitions. [2022-03-15 16:39:23,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3115 transitions. [2022-03-15 16:39:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:23,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:23,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:23,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:24,084 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,SelfDestructingSolverStorable12 [2022-03-15 16:39:24,085 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:24,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1310692250, now seen corresponding path program 10 times [2022-03-15 16:39:24,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:24,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486149018] [2022-03-15 16:39:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:24,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:24,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:24,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486149018] [2022-03-15 16:39:24,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486149018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:24,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126939912] [2022-03-15 16:39:24,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:24,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:24,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:24,132 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:24,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 16:39:24,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:24,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:24,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:24,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:24,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:24,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126939912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:24,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:24,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 16:39:24,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762532968] [2022-03-15 16:39:24,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:24,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:39:24,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:24,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:39:24,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:39:24,316 INFO L87 Difference]: Start difference. First operand 959 states and 3115 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:24,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:24,632 INFO L93 Difference]: Finished difference Result 2387 states and 7369 transitions. [2022-03-15 16:39:24,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 16:39:24,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:24,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:24,640 INFO L225 Difference]: With dead ends: 2387 [2022-03-15 16:39:24,640 INFO L226 Difference]: Without dead ends: 2312 [2022-03-15 16:39:24,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:39:24,642 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 314 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:24,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 177 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:24,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2312 states. [2022-03-15 16:39:24,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2312 to 1446. [2022-03-15 16:39:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1446 states, 1445 states have (on average 3.3155709342560553) internal successors, (4791), 1445 states have internal predecessors, (4791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:24,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1446 states to 1446 states and 4791 transitions. [2022-03-15 16:39:24,679 INFO L78 Accepts]: Start accepts. Automaton has 1446 states and 4791 transitions. Word has length 27 [2022-03-15 16:39:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:24,680 INFO L470 AbstractCegarLoop]: Abstraction has 1446 states and 4791 transitions. [2022-03-15 16:39:24,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:24,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1446 states and 4791 transitions. [2022-03-15 16:39:24,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:24,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:24,684 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, 1, 1, 1, 1] [2022-03-15 16:39:24,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:24,905 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 [2022-03-15 16:39:24,905 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:24,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:24,906 INFO L85 PathProgramCache]: Analyzing trace with hash -365824241, now seen corresponding path program 2 times [2022-03-15 16:39:24,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:24,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868799934] [2022-03-15 16:39:24,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:24,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:24,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:24,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868799934] [2022-03-15 16:39:24,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868799934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:24,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283017142] [2022-03-15 16:39:24,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:24,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:24,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:24,943 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:24,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 16:39:24,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:24,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:24,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:39:24,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:25,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:25,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:25,118 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283017142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:25,118 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:25,118 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-03-15 16:39:25,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465976090] [2022-03-15 16:39:25,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:25,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:39:25,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:39:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:39:25,119 INFO L87 Difference]: Start difference. First operand 1446 states and 4791 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:25,339 INFO L93 Difference]: Finished difference Result 2562 states and 7823 transitions. [2022-03-15 16:39:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 16:39:25,340 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:25,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:25,345 INFO L225 Difference]: With dead ends: 2562 [2022-03-15 16:39:25,345 INFO L226 Difference]: Without dead ends: 2562 [2022-03-15 16:39:25,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-03-15 16:39:25,346 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 228 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:25,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 96 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:39:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2562 states. [2022-03-15 16:39:25,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2562 to 1516. [2022-03-15 16:39:25,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1516 states, 1515 states have (on average 3.2825082508250825) internal successors, (4973), 1515 states have internal predecessors, (4973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:25,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 4973 transitions. [2022-03-15 16:39:25,380 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 4973 transitions. Word has length 27 [2022-03-15 16:39:25,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:25,380 INFO L470 AbstractCegarLoop]: Abstraction has 1516 states and 4973 transitions. [2022-03-15 16:39:25,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:25,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 4973 transitions. [2022-03-15 16:39:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:25,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:25,384 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:25,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:25,607 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 [2022-03-15 16:39:25,608 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:25,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1263858044, now seen corresponding path program 11 times [2022-03-15 16:39:25,608 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:25,608 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572804647] [2022-03-15 16:39:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:25,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:25,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572804647] [2022-03-15 16:39:25,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572804647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:25,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813900396] [2022-03-15 16:39:25,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:25,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:25,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:25,655 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:25,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 16:39:25,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:39:25,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:25,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:25,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813900396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:25,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:25,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:39:25,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26919755] [2022-03-15 16:39:25,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:25,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:39:25,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:39:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:39:25,841 INFO L87 Difference]: Start difference. First operand 1516 states and 4973 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:26,478 INFO L93 Difference]: Finished difference Result 4948 states and 14924 transitions. [2022-03-15 16:39:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 16:39:26,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 [2022-03-15 16:39:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:26,491 INFO L225 Difference]: With dead ends: 4948 [2022-03-15 16:39:26,491 INFO L226 Difference]: Without dead ends: 4948 [2022-03-15 16:39:26,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 16:39:26,492 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 274 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:26,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 182 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:26,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4948 states. [2022-03-15 16:39:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4948 to 1544. [2022-03-15 16:39:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.2773817239144525) internal successors, (5057), 1543 states have internal predecessors, (5057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:26,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5057 transitions. [2022-03-15 16:39:26,553 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5057 transitions. Word has length 27 [2022-03-15 16:39:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:26,553 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5057 transitions. [2022-03-15 16:39:26,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5057 transitions. [2022-03-15 16:39:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:26,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:26,557 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:26,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:26,771 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 [2022-03-15 16:39:26,771 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1176133672, now seen corresponding path program 12 times [2022-03-15 16:39:26,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:26,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145340593] [2022-03-15 16:39:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:26,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:26,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:26,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145340593] [2022-03-15 16:39:26,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145340593] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:26,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551938415] [2022-03-15 16:39:26,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:26,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:26,818 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:26,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 16:39:26,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:39:26,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:26,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:26,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:27,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551938415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:27,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:27,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:39:27,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805452876] [2022-03-15 16:39:27,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:27,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:39:27,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:27,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:39:27,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:39:27,019 INFO L87 Difference]: Start difference. First operand 1544 states and 5057 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:27,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:27,870 INFO L93 Difference]: Finished difference Result 4977 states and 15097 transitions. [2022-03-15 16:39:27,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:39:27,871 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 [2022-03-15 16:39:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:27,885 INFO L225 Difference]: With dead ends: 4977 [2022-03-15 16:39:27,886 INFO L226 Difference]: Without dead ends: 4977 [2022-03-15 16:39:27,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:39:27,891 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 325 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:27,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 166 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2022-03-15 16:39:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 1698. [2022-03-15 16:39:27,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 3.2421921037124335) internal successors, (5502), 1697 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:27,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 5502 transitions. [2022-03-15 16:39:27,959 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 5502 transitions. Word has length 27 [2022-03-15 16:39:27,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:27,959 INFO L470 AbstractCegarLoop]: Abstraction has 1698 states and 5502 transitions. [2022-03-15 16:39:27,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:27,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 5502 transitions. [2022-03-15 16:39:27,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:27,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:27,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:27,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 16:39:28,185 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 [2022-03-15 16:39:28,185 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:28,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:28,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1798101086, now seen corresponding path program 13 times [2022-03-15 16:39:28,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:28,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621026057] [2022-03-15 16:39:28,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:28,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:28,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:28,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621026057] [2022-03-15 16:39:28,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621026057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:28,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42075537] [2022-03-15 16:39:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:28,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:28,225 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:28,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 16:39:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:28,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:28,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:28,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:28,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:28,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42075537] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:28,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:28,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-03-15 16:39:28,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472142676] [2022-03-15 16:39:28,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:28,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:39:28,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:39:28,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:39:28,400 INFO L87 Difference]: Start difference. First operand 1698 states and 5502 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:28,720 INFO L93 Difference]: Finished difference Result 3298 states and 10264 transitions. [2022-03-15 16:39:28,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 16:39:28,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:28,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:28,727 INFO L225 Difference]: With dead ends: 3298 [2022-03-15 16:39:28,728 INFO L226 Difference]: Without dead ends: 3298 [2022-03-15 16:39:28,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:39:28,729 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 224 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:28,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 245 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2022-03-15 16:39:28,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 2095. [2022-03-15 16:39:28,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2095 states, 2094 states have (on average 3.292263610315186) internal successors, (6894), 2094 states have internal predecessors, (6894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2095 states to 2095 states and 6894 transitions. [2022-03-15 16:39:28,782 INFO L78 Accepts]: Start accepts. Automaton has 2095 states and 6894 transitions. Word has length 27 [2022-03-15 16:39:28,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:28,782 INFO L470 AbstractCegarLoop]: Abstraction has 2095 states and 6894 transitions. [2022-03-15 16:39:28,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2095 states and 6894 transitions. [2022-03-15 16:39:28,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:28,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:28,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:28,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:29,003 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 [2022-03-15 16:39:29,003 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:29,004 INFO L85 PathProgramCache]: Analyzing trace with hash -373797268, now seen corresponding path program 14 times [2022-03-15 16:39:29,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:29,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703207335] [2022-03-15 16:39:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:29,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:29,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:29,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:29,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703207335] [2022-03-15 16:39:29,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703207335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:29,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189492009] [2022-03-15 16:39:29,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:29,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:29,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:29,050 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:29,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 16:39:29,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:29,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:29,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:29,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:29,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189492009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:29,223 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:29,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:39:29,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021573753] [2022-03-15 16:39:29,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:29,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:39:29,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:29,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:39:29,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:39:29,224 INFO L87 Difference]: Start difference. First operand 2095 states and 6894 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:29,826 INFO L93 Difference]: Finished difference Result 5572 states and 17373 transitions. [2022-03-15 16:39:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 16:39:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 [2022-03-15 16:39:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:29,835 INFO L225 Difference]: With dead ends: 5572 [2022-03-15 16:39:29,835 INFO L226 Difference]: Without dead ends: 5568 [2022-03-15 16:39:29,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:39:29,836 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 314 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:29,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 166 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 722 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:29,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5568 states. [2022-03-15 16:39:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5568 to 2107. [2022-03-15 16:39:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2107 states, 2106 states have (on average 3.2830009496676165) internal successors, (6914), 2106 states have internal predecessors, (6914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2107 states to 2107 states and 6914 transitions. [2022-03-15 16:39:29,941 INFO L78 Accepts]: Start accepts. Automaton has 2107 states and 6914 transitions. Word has length 27 [2022-03-15 16:39:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:29,941 INFO L470 AbstractCegarLoop]: Abstraction has 2107 states and 6914 transitions. [2022-03-15 16:39:29,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 2107 states and 6914 transitions. [2022-03-15 16:39:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:29,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:29,947 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:29,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:30,167 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 [2022-03-15 16:39:30,167 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:30,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1969066128, now seen corresponding path program 15 times [2022-03-15 16:39:30,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:30,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147065293] [2022-03-15 16:39:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:30,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:30,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147065293] [2022-03-15 16:39:30,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147065293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:30,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619291702] [2022-03-15 16:39:30,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:30,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:30,217 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 16:39:30,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:39:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:30,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:30,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:30,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619291702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:30,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:30,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:39:30,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057698452] [2022-03-15 16:39:30,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:30,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:30,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:30,450 INFO L87 Difference]: Start difference. First operand 2107 states and 6914 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:31,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:31,459 INFO L93 Difference]: Finished difference Result 6717 states and 20024 transitions. [2022-03-15 16:39:31,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:39:31,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:31,471 INFO L225 Difference]: With dead ends: 6717 [2022-03-15 16:39:31,472 INFO L226 Difference]: Without dead ends: 6717 [2022-03-15 16:39:31,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 16:39:31,473 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 512 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:31,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 270 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 16:39:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6717 states. [2022-03-15 16:39:31,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6717 to 2278. [2022-03-15 16:39:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.3205972771190164) internal successors, (7561), 2277 states have internal predecessors, (7561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 7561 transitions. [2022-03-15 16:39:31,566 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 7561 transitions. Word has length 27 [2022-03-15 16:39:31,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:31,566 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 7561 transitions. [2022-03-15 16:39:31,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:31,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 7561 transitions. [2022-03-15 16:39:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:31,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:31,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:31,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:31,787 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 [2022-03-15 16:39:31,787 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:31,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:31,788 INFO L85 PathProgramCache]: Analyzing trace with hash -186416658, now seen corresponding path program 16 times [2022-03-15 16:39:31,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:31,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817200436] [2022-03-15 16:39:31,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:31,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:31,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:31,841 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:31,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817200436] [2022-03-15 16:39:31,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817200436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:31,841 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647555724] [2022-03-15 16:39:31,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:31,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:31,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:31,842 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:31,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 16:39:31,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:31,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:31,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:31,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:32,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:32,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647555724] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:32,063 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:32,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:39:32,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126333236] [2022-03-15 16:39:32,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:32,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:32,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:32,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:32,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:32,064 INFO L87 Difference]: Start difference. First operand 2278 states and 7561 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:33,454 INFO L93 Difference]: Finished difference Result 6560 states and 19950 transitions. [2022-03-15 16:39:33,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 16:39:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:33,464 INFO L225 Difference]: With dead ends: 6560 [2022-03-15 16:39:33,464 INFO L226 Difference]: Without dead ends: 6556 [2022-03-15 16:39:33,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 16:39:33,466 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 520 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:33,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 319 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 16:39:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6556 states. [2022-03-15 16:39:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6556 to 2278. [2022-03-15 16:39:33,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.3197189284145807) internal successors, (7559), 2277 states have internal predecessors, (7559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 7559 transitions. [2022-03-15 16:39:33,530 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 7559 transitions. Word has length 27 [2022-03-15 16:39:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:33,531 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 7559 transitions. [2022-03-15 16:39:33,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 7559 transitions. [2022-03-15 16:39:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:33,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:33,535 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, 1, 1, 1, 1] [2022-03-15 16:39:33,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:33,751 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 [2022-03-15 16:39:33,751 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:33,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash -274598579, now seen corresponding path program 3 times [2022-03-15 16:39:33,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:33,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224649203] [2022-03-15 16:39:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:33,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:33,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:33,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:33,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224649203] [2022-03-15 16:39:33,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224649203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:33,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772812459] [2022-03-15 16:39:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:33,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:33,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:33,789 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:33,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 16:39:33,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 16:39:33,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 16:39:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:33,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:33,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:33,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772812459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:33,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:33,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-03-15 16:39:33,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986938206] [2022-03-15 16:39:33,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:33,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 16:39:33,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 16:39:33,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 16:39:33,974 INFO L87 Difference]: Start difference. First operand 2278 states and 7559 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:34,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:34,138 INFO L93 Difference]: Finished difference Result 2906 states and 9295 transitions. [2022-03-15 16:39:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 16:39:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:34,144 INFO L225 Difference]: With dead ends: 2906 [2022-03-15 16:39:34,144 INFO L226 Difference]: Without dead ends: 2906 [2022-03-15 16:39:34,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:39:34,145 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 124 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:34,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 102 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 16:39:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2906 states. [2022-03-15 16:39:34,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2906 to 2121. [2022-03-15 16:39:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 2120 states have (on average 3.3141509433962266) internal successors, (7026), 2120 states have internal predecessors, (7026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:34,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 7026 transitions. [2022-03-15 16:39:34,189 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 7026 transitions. Word has length 27 [2022-03-15 16:39:34,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:34,189 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 7026 transitions. [2022-03-15 16:39:34,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 7026 transitions. [2022-03-15 16:39:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:34,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:34,193 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:34,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:34,416 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 [2022-03-15 16:39:34,417 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash -995298344, now seen corresponding path program 17 times [2022-03-15 16:39:34,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:34,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066993638] [2022-03-15 16:39:34,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:34,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:34,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:34,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066993638] [2022-03-15 16:39:34,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066993638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:34,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156820202] [2022-03-15 16:39:34,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:34,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:34,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:34,462 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:34,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 16:39:34,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:39:34,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:34,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:34,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:34,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156820202] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:34,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:34,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:39:34,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887378692] [2022-03-15 16:39:34,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:39:34,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:34,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:39:34,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:39:34,608 INFO L87 Difference]: Start difference. First operand 2121 states and 7026 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:35,039 INFO L93 Difference]: Finished difference Result 4738 states and 14874 transitions. [2022-03-15 16:39:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 16:39:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:35,047 INFO L225 Difference]: With dead ends: 4738 [2022-03-15 16:39:35,047 INFO L226 Difference]: Without dead ends: 4738 [2022-03-15 16:39:35,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:39:35,047 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 219 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:35,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 146 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4738 states. [2022-03-15 16:39:35,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4738 to 2263. [2022-03-15 16:39:35,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 3.2904509283819627) internal successors, (7443), 2262 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 7443 transitions. [2022-03-15 16:39:35,111 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 7443 transitions. Word has length 27 [2022-03-15 16:39:35,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:35,112 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 7443 transitions. [2022-03-15 16:39:35,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 7443 transitions. [2022-03-15 16:39:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:35,116 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:35,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:35,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-15 16:39:35,330 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 [2022-03-15 16:39:35,331 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:35,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:35,331 INFO L85 PathProgramCache]: Analyzing trace with hash -342770436, now seen corresponding path program 18 times [2022-03-15 16:39:35,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:35,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030168017] [2022-03-15 16:39:35,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:35,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:35,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:35,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:35,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:35,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030168017] [2022-03-15 16:39:35,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030168017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:35,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999791933] [2022-03-15 16:39:35,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:35,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:35,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:35,368 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:35,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 16:39:35,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:39:35,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:35,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:35,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:35,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:35,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999791933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:35,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:35,521 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:39:35,521 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371857558] [2022-03-15 16:39:35,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:35,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:39:35,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:39:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:39:35,522 INFO L87 Difference]: Start difference. First operand 2263 states and 7443 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:35,918 INFO L93 Difference]: Finished difference Result 5029 states and 15712 transitions. [2022-03-15 16:39:35,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 16:39:35,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:35,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:35,926 INFO L225 Difference]: With dead ends: 5029 [2022-03-15 16:39:35,926 INFO L226 Difference]: Without dead ends: 5029 [2022-03-15 16:39:35,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:39:35,927 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 207 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:35,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 127 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5029 states. [2022-03-15 16:39:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5029 to 2429. [2022-03-15 16:39:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2429 states, 2428 states have (on average 3.2701812191103787) internal successors, (7940), 2428 states have internal predecessors, (7940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2429 states to 2429 states and 7940 transitions. [2022-03-15 16:39:35,978 INFO L78 Accepts]: Start accepts. Automaton has 2429 states and 7940 transitions. Word has length 27 [2022-03-15 16:39:35,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:35,979 INFO L470 AbstractCegarLoop]: Abstraction has 2429 states and 7940 transitions. [2022-03-15 16:39:35,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:35,979 INFO L276 IsEmpty]: Start isEmpty. Operand 2429 states and 7940 transitions. [2022-03-15 16:39:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:35,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:35,984 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:36,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:36,204 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 [2022-03-15 16:39:36,205 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:36,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:36,205 INFO L85 PathProgramCache]: Analyzing trace with hash -670100712, now seen corresponding path program 19 times [2022-03-15 16:39:36,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:36,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879609973] [2022-03-15 16:39:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:36,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:36,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:36,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879609973] [2022-03-15 16:39:36,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879609973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:36,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210555397] [2022-03-15 16:39:36,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:36,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:36,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:36,256 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:36,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 16:39:36,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:36,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:36,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:36,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:36,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210555397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:36,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:36,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-03-15 16:39:36,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774776023] [2022-03-15 16:39:36,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:36,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:39:36,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:36,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:39:36,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:39:36,465 INFO L87 Difference]: Start difference. First operand 2429 states and 7940 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:36,727 INFO L93 Difference]: Finished difference Result 3230 states and 10321 transitions. [2022-03-15 16:39:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 16:39:36,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 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 27 [2022-03-15 16:39:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:36,733 INFO L225 Difference]: With dead ends: 3230 [2022-03-15 16:39:36,733 INFO L226 Difference]: Without dead ends: 3220 [2022-03-15 16:39:36,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:39:36,733 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 187 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:36,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 194 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2022-03-15 16:39:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2644. [2022-03-15 16:39:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.3019296254256525) internal successors, (8727), 2643 states have internal predecessors, (8727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:36,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8727 transitions. [2022-03-15 16:39:36,771 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8727 transitions. Word has length 27 [2022-03-15 16:39:36,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:36,772 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8727 transitions. [2022-03-15 16:39:36,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8727 transitions. [2022-03-15 16:39:36,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:36,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:36,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:36,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:36,997 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 [2022-03-15 16:39:36,997 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1892701376, now seen corresponding path program 20 times [2022-03-15 16:39:36,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:36,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211626792] [2022-03-15 16:39:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:37,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:37,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211626792] [2022-03-15 16:39:37,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211626792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:37,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087294457] [2022-03-15 16:39:37,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:37,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:37,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:37,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 16:39:37,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:37,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:37,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:37,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:37,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087294457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:37,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:37,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-03-15 16:39:37,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376643648] [2022-03-15 16:39:37,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:37,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 16:39:37,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:37,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 16:39:37,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 16:39:37,178 INFO L87 Difference]: Start difference. First operand 2644 states and 8727 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:37,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:37,497 INFO L93 Difference]: Finished difference Result 5352 states and 17038 transitions. [2022-03-15 16:39:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 16:39:37,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:37,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:37,505 INFO L225 Difference]: With dead ends: 5352 [2022-03-15 16:39:37,505 INFO L226 Difference]: Without dead ends: 5348 [2022-03-15 16:39:37,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-03-15 16:39:37,506 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 210 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:37,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 120 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:37,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-15 16:39:37,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 2644. [2022-03-15 16:39:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2644 states, 2643 states have (on average 3.2996594778660615) internal successors, (8721), 2643 states have internal predecessors, (8721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 8721 transitions. [2022-03-15 16:39:37,585 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 8721 transitions. Word has length 27 [2022-03-15 16:39:37,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:37,585 INFO L470 AbstractCegarLoop]: Abstraction has 2644 states and 8721 transitions. [2022-03-15 16:39:37,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:37,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 8721 transitions. [2022-03-15 16:39:37,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:37,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:37,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:37,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:37,807 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 [2022-03-15 16:39:37,807 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -400696644, now seen corresponding path program 21 times [2022-03-15 16:39:37,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:37,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327007379] [2022-03-15 16:39:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:37,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:37,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:37,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327007379] [2022-03-15 16:39:37,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327007379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:37,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124032602] [2022-03-15 16:39:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:37,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:37,854 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:37,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 16:39:37,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:39:37,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:37,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:37,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:38,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124032602] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:38,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:38,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-03-15 16:39:38,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214648314] [2022-03-15 16:39:38,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:38,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 16:39:38,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:38,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 16:39:38,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-03-15 16:39:38,008 INFO L87 Difference]: Start difference. First operand 2644 states and 8721 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:38,356 INFO L93 Difference]: Finished difference Result 5332 states and 16988 transitions. [2022-03-15 16:39:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 16:39:38,356 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:38,364 INFO L225 Difference]: With dead ends: 5332 [2022-03-15 16:39:38,364 INFO L226 Difference]: Without dead ends: 5316 [2022-03-15 16:39:38,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:39:38,365 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 218 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:38,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 146 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 16:39:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5316 states. [2022-03-15 16:39:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5316 to 2652. [2022-03-15 16:39:38,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2652 states, 2651 states have (on average 3.29422859298378) internal successors, (8733), 2651 states have internal predecessors, (8733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 8733 transitions. [2022-03-15 16:39:38,414 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 8733 transitions. Word has length 27 [2022-03-15 16:39:38,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:38,414 INFO L470 AbstractCegarLoop]: Abstraction has 2652 states and 8733 transitions. [2022-03-15 16:39:38,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:38,414 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 8733 transitions. [2022-03-15 16:39:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:38,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:38,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:38,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 16:39:38,618 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 [2022-03-15 16:39:38,619 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:38,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1940484412, now seen corresponding path program 22 times [2022-03-15 16:39:38,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:38,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539054309] [2022-03-15 16:39:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:38,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:38,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:38,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539054309] [2022-03-15 16:39:38,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539054309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:38,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749311329] [2022-03-15 16:39:38,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:38,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:38,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:38,669 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:38,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 16:39:38,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:38,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:38,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:38,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:38,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749311329] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:38,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:38,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:39:38,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950834297] [2022-03-15 16:39:38,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:38,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:38,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:38,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:38,949 INFO L87 Difference]: Start difference. First operand 2652 states and 8733 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:39,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:39,913 INFO L93 Difference]: Finished difference Result 11005 states and 34872 transitions. [2022-03-15 16:39:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-15 16:39:39,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:39,934 INFO L225 Difference]: With dead ends: 11005 [2022-03-15 16:39:39,934 INFO L226 Difference]: Without dead ends: 11005 [2022-03-15 16:39:39,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:39:39,935 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 547 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:39,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 212 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:39,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11005 states. [2022-03-15 16:39:40,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11005 to 3423. [2022-03-15 16:39:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3423 states, 3422 states have (on average 3.4585037989479837) internal successors, (11835), 3422 states have internal predecessors, (11835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3423 states to 3423 states and 11835 transitions. [2022-03-15 16:39:40,044 INFO L78 Accepts]: Start accepts. Automaton has 3423 states and 11835 transitions. Word has length 27 [2022-03-15 16:39:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:40,044 INFO L470 AbstractCegarLoop]: Abstraction has 3423 states and 11835 transitions. [2022-03-15 16:39:40,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3423 states and 11835 transitions. [2022-03-15 16:39:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:40,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:40,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:40,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 16:39:40,250 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 [2022-03-15 16:39:40,250 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1746583744, now seen corresponding path program 23 times [2022-03-15 16:39:40,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:40,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105625399] [2022-03-15 16:39:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:40,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:40,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105625399] [2022-03-15 16:39:40,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105625399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:40,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247519815] [2022-03-15 16:39:40,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:40,298 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:40,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 16:39:40,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:39:40,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:40,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:40,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:40,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:40,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:40,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247519815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:40,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:40,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:39:40,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603675804] [2022-03-15 16:39:40,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:40,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:40,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:40,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:40,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:40,532 INFO L87 Difference]: Start difference. First operand 3423 states and 11835 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:41,361 INFO L93 Difference]: Finished difference Result 9376 states and 29674 transitions. [2022-03-15 16:39:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:39:41,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:41,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:41,378 INFO L225 Difference]: With dead ends: 9376 [2022-03-15 16:39:41,378 INFO L226 Difference]: Without dead ends: 9376 [2022-03-15 16:39:41,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 16:39:41,379 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 501 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:41,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 212 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9376 states. [2022-03-15 16:39:41,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9376 to 3420. [2022-03-15 16:39:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.4574436969874234) internal successors, (11821), 3419 states have internal predecessors, (11821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:41,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 11821 transitions. [2022-03-15 16:39:41,517 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 11821 transitions. Word has length 27 [2022-03-15 16:39:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:41,517 INFO L470 AbstractCegarLoop]: Abstraction has 3420 states and 11821 transitions. [2022-03-15 16:39:41,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 11821 transitions. [2022-03-15 16:39:41,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:41,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:41,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:41,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 16:39:41,723 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 [2022-03-15 16:39:41,723 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1374673978, now seen corresponding path program 24 times [2022-03-15 16:39:41,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:41,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398495536] [2022-03-15 16:39:41,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:41,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:41,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:41,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398495536] [2022-03-15 16:39:41,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398495536] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:41,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135475890] [2022-03-15 16:39:41,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:41,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:41,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:41,770 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:41,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 16:39:41,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 16:39:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:41,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:41,881 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:41,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:41,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135475890] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:41,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:41,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:39:41,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618809902] [2022-03-15 16:39:41,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:41,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:39:41,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:41,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:39:41,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:39:41,957 INFO L87 Difference]: Start difference. First operand 3420 states and 11821 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:42,722 INFO L93 Difference]: Finished difference Result 10210 states and 32078 transitions. [2022-03-15 16:39:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 16:39:42,722 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:42,740 INFO L225 Difference]: With dead ends: 10210 [2022-03-15 16:39:42,740 INFO L226 Difference]: Without dead ends: 10210 [2022-03-15 16:39:42,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 16:39:42,742 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 374 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:42,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 199 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:42,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2022-03-15 16:39:42,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 3434. [2022-03-15 16:39:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.459364986891931) internal successors, (11876), 3433 states have internal predecessors, (11876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11876 transitions. [2022-03-15 16:39:42,916 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11876 transitions. Word has length 27 [2022-03-15 16:39:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:42,916 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11876 transitions. [2022-03-15 16:39:42,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11876 transitions. [2022-03-15 16:39:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:42,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:42,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:42,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-15 16:39:43,123 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 [2022-03-15 16:39:43,123 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:43,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1185455680, now seen corresponding path program 25 times [2022-03-15 16:39:43,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:43,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205656790] [2022-03-15 16:39:43,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:43,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:43,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:43,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205656790] [2022-03-15 16:39:43,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205656790] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:43,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751125912] [2022-03-15 16:39:43,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:43,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:43,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:43,168 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:43,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 16:39:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:43,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:43,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:43,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:43,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751125912] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:43,355 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:43,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-03-15 16:39:43,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820053787] [2022-03-15 16:39:43,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:43,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 16:39:43,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 16:39:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 16:39:43,356 INFO L87 Difference]: Start difference. First operand 3434 states and 11876 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:43,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:43,993 INFO L93 Difference]: Finished difference Result 9874 states and 31277 transitions. [2022-03-15 16:39:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:39:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:44,010 INFO L225 Difference]: With dead ends: 9874 [2022-03-15 16:39:44,010 INFO L226 Difference]: Without dead ends: 9870 [2022-03-15 16:39:44,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 16:39:44,011 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 510 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:44,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 161 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:44,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-03-15 16:39:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 3434. [2022-03-15 16:39:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-15 16:39:44,132 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-15 16:39:44,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:44,133 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-15 16:39:44,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-15 16:39:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:44,140 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:44,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:44,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-15 16:39:44,347 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 [2022-03-15 16:39:44,347 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:44,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1719990400, now seen corresponding path program 26 times [2022-03-15 16:39:44,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:44,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526520719] [2022-03-15 16:39:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:44,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:44,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:44,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526520719] [2022-03-15 16:39:44,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526520719] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:44,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082026991] [2022-03-15 16:39:44,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:44,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:44,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:44,393 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:44,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 16:39:44,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:44,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:44,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:44,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082026991] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:44,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:44,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:39:44,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599404346] [2022-03-15 16:39:44,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:44,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:44,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:44,603 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:45,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:45,286 INFO L93 Difference]: Finished difference Result 8065 states and 25290 transitions. [2022-03-15 16:39:45,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:39:45,287 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:45,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:45,300 INFO L225 Difference]: With dead ends: 8065 [2022-03-15 16:39:45,300 INFO L226 Difference]: Without dead ends: 8065 [2022-03-15 16:39:45,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 16:39:45,301 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 438 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:45,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 224 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:45,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8065 states. [2022-03-15 16:39:45,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8065 to 3440. [2022-03-15 16:39:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.4594358825239895) internal successors, (11897), 3439 states have internal predecessors, (11897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 11897 transitions. [2022-03-15 16:39:45,416 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 11897 transitions. Word has length 27 [2022-03-15 16:39:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:45,417 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 11897 transitions. [2022-03-15 16:39:45,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:45,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 11897 transitions. [2022-03-15 16:39:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:45,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:45,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:45,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:45,623 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 [2022-03-15 16:39:45,623 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:45,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:45,623 INFO L85 PathProgramCache]: Analyzing trace with hash 62659070, now seen corresponding path program 27 times [2022-03-15 16:39:45,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:45,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055154921] [2022-03-15 16:39:45,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:45,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:45,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055154921] [2022-03-15 16:39:45,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055154921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:45,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392029450] [2022-03-15 16:39:45,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:45,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:45,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:45,663 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:45,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 16:39:45,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:39:45,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:45,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:45,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 16:39:45,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392029450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:45,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:45,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-03-15 16:39:45,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721935489] [2022-03-15 16:39:45,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:45,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 16:39:45,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 16:39:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-15 16:39:45,871 INFO L87 Difference]: Start difference. First operand 3440 states and 11897 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:46,739 INFO L93 Difference]: Finished difference Result 7992 states and 25480 transitions. [2022-03-15 16:39:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 16:39:46,739 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:46,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:46,753 INFO L225 Difference]: With dead ends: 7992 [2022-03-15 16:39:46,753 INFO L226 Difference]: Without dead ends: 7988 [2022-03-15 16:39:46,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 16:39:46,754 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 504 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:46,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 185 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7988 states. [2022-03-15 16:39:46,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7988 to 3434. [2022-03-15 16:39:46,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.45819982522575) internal successors, (11872), 3433 states have internal predecessors, (11872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 11872 transitions. [2022-03-15 16:39:46,842 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 11872 transitions. Word has length 27 [2022-03-15 16:39:46,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:46,843 INFO L470 AbstractCegarLoop]: Abstraction has 3434 states and 11872 transitions. [2022-03-15 16:39:46,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:46,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 11872 transitions. [2022-03-15 16:39:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:46,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:46,863 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:46,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:47,073 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 [2022-03-15 16:39:47,073 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:47,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:47,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1105927550, now seen corresponding path program 28 times [2022-03-15 16:39:47,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:47,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006891661] [2022-03-15 16:39:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:47,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:47,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:47,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006891661] [2022-03-15 16:39:47,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006891661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:47,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416526638] [2022-03-15 16:39:47,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:47,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:47,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:47,115 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:47,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 16:39:47,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:47,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:47,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:47,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:47,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:47,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:47,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416526638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:47,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:47,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:39:47,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880582057] [2022-03-15 16:39:47,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:47,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:39:47,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:47,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:39:47,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:39:47,286 INFO L87 Difference]: Start difference. First operand 3434 states and 11872 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:47,998 INFO L93 Difference]: Finished difference Result 8817 states and 28422 transitions. [2022-03-15 16:39:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:39:47,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:48,013 INFO L225 Difference]: With dead ends: 8817 [2022-03-15 16:39:48,014 INFO L226 Difference]: Without dead ends: 8817 [2022-03-15 16:39:48,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 16:39:48,015 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 321 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:48,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 167 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:48,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8817 states. [2022-03-15 16:39:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8817 to 3737. [2022-03-15 16:39:48,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3737 states, 3736 states have (on average 3.4494111349036403) internal successors, (12887), 3736 states have internal predecessors, (12887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:48,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3737 states to 3737 states and 12887 transitions. [2022-03-15 16:39:48,107 INFO L78 Accepts]: Start accepts. Automaton has 3737 states and 12887 transitions. Word has length 27 [2022-03-15 16:39:48,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:48,108 INFO L470 AbstractCegarLoop]: Abstraction has 3737 states and 12887 transitions. [2022-03-15 16:39:48,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3737 states and 12887 transitions. [2022-03-15 16:39:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:48,113 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:48,113 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:48,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 16:39:48,314 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 [2022-03-15 16:39:48,314 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:48,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:48,314 INFO L85 PathProgramCache]: Analyzing trace with hash 916709252, now seen corresponding path program 29 times [2022-03-15 16:39:48,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:48,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657063421] [2022-03-15 16:39:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:48,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:48,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:48,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:48,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657063421] [2022-03-15 16:39:48,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657063421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:48,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168600058] [2022-03-15 16:39:48,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:39:48,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:48,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:48,355 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:48,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 16:39:48,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 16:39:48,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:48,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:48,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:48,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:48,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168600058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:48,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:48,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:39:48,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525100236] [2022-03-15 16:39:48,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:48,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:39:48,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:39:48,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:39:48,518 INFO L87 Difference]: Start difference. First operand 3737 states and 12887 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:49,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:49,101 INFO L93 Difference]: Finished difference Result 8396 states and 27364 transitions. [2022-03-15 16:39:49,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 16:39:49,101 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:49,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:49,116 INFO L225 Difference]: With dead ends: 8396 [2022-03-15 16:39:49,116 INFO L226 Difference]: Without dead ends: 8388 [2022-03-15 16:39:49,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 16:39:49,117 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 362 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:49,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 141 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:49,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8388 states. [2022-03-15 16:39:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8388 to 3725. [2022-03-15 16:39:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3725 states, 3724 states have (on average 3.44656283566058) internal successors, (12835), 3724 states have internal predecessors, (12835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 12835 transitions. [2022-03-15 16:39:49,209 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 12835 transitions. Word has length 27 [2022-03-15 16:39:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:49,209 INFO L470 AbstractCegarLoop]: Abstraction has 3725 states and 12835 transitions. [2022-03-15 16:39:49,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 12835 transitions. [2022-03-15 16:39:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:49,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:49,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:49,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 16:39:49,416 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 [2022-03-15 16:39:49,416 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:49,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1560091512, now seen corresponding path program 30 times [2022-03-15 16:39:49,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:49,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062368953] [2022-03-15 16:39:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:49,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:49,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:49,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062368953] [2022-03-15 16:39:49,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062368953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:49,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479307195] [2022-03-15 16:39:49,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:39:49,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:49,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:49,470 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:49,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 16:39:49,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:39:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:49,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:49,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:49,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479307195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:49,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:49,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-15 16:39:49,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184884538] [2022-03-15 16:39:49,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:49,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 16:39:49,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:49,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 16:39:49,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-03-15 16:39:49,675 INFO L87 Difference]: Start difference. First operand 3725 states and 12835 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:50,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:50,314 INFO L93 Difference]: Finished difference Result 9052 states and 28913 transitions. [2022-03-15 16:39:50,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:39:50,314 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:50,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:50,330 INFO L225 Difference]: With dead ends: 9052 [2022-03-15 16:39:50,330 INFO L226 Difference]: Without dead ends: 9036 [2022-03-15 16:39:50,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 16:39:50,331 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 339 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:50,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 181 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:50,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2022-03-15 16:39:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 3753. [2022-03-15 16:39:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3753 states, 3752 states have (on average 3.446961620469083) internal successors, (12933), 3752 states have internal predecessors, (12933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3753 states to 3753 states and 12933 transitions. [2022-03-15 16:39:50,433 INFO L78 Accepts]: Start accepts. Automaton has 3753 states and 12933 transitions. Word has length 27 [2022-03-15 16:39:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:50,433 INFO L470 AbstractCegarLoop]: Abstraction has 3753 states and 12933 transitions. [2022-03-15 16:39:50,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:50,433 INFO L276 IsEmpty]: Start isEmpty. Operand 3753 states and 12933 transitions. [2022-03-15 16:39:50,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:50,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:50,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:50,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 16:39:50,638 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 [2022-03-15 16:39:50,639 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:50,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:50,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1872447484, now seen corresponding path program 31 times [2022-03-15 16:39:50,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:50,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285753747] [2022-03-15 16:39:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:50,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:50,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:50,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:50,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285753747] [2022-03-15 16:39:50,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285753747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:50,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337997553] [2022-03-15 16:39:50,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:39:50,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:50,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:50,690 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:50,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 16:39:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:50,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:50,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:50,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337997553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:50,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:50,910 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:39:50,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939949271] [2022-03-15 16:39:50,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:50,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:39:50,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:50,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:39:50,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:39:50,911 INFO L87 Difference]: Start difference. First operand 3753 states and 12933 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:51,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:51,596 INFO L93 Difference]: Finished difference Result 7240 states and 23141 transitions. [2022-03-15 16:39:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 16:39:51,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:51,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:51,610 INFO L225 Difference]: With dead ends: 7240 [2022-03-15 16:39:51,610 INFO L226 Difference]: Without dead ends: 7240 [2022-03-15 16:39:51,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 16:39:51,611 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 470 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:51,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [470 Valid, 268 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7240 states. [2022-03-15 16:39:51,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7240 to 3938. [2022-03-15 16:39:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 3.4384048768097535) internal successors, (13537), 3937 states have internal predecessors, (13537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 13537 transitions. [2022-03-15 16:39:51,716 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 13537 transitions. Word has length 27 [2022-03-15 16:39:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:51,716 INFO L470 AbstractCegarLoop]: Abstraction has 3938 states and 13537 transitions. [2022-03-15 16:39:51,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 13537 transitions. [2022-03-15 16:39:51,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:51,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:51,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:51,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 16:39:51,921 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 [2022-03-15 16:39:51,921 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:51,922 INFO L85 PathProgramCache]: Analyzing trace with hash -639870342, now seen corresponding path program 32 times [2022-03-15 16:39:51,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:51,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480894403] [2022-03-15 16:39:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:51,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:51,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:51,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480894403] [2022-03-15 16:39:51,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480894403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:51,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296131787] [2022-03-15 16:39:51,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:39:51,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:51,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:51,966 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:51,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 16:39:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:39:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:52,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:52,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296131787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:52,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:52,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-15 16:39:52,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397843651] [2022-03-15 16:39:52,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:52,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 16:39:52,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 16:39:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-15 16:39:52,171 INFO L87 Difference]: Start difference. First operand 3938 states and 13537 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:53,079 INFO L93 Difference]: Finished difference Result 7155 states and 23290 transitions. [2022-03-15 16:39:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 16:39:53,079 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 16:39:53,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:53,092 INFO L225 Difference]: With dead ends: 7155 [2022-03-15 16:39:53,092 INFO L226 Difference]: Without dead ends: 7151 [2022-03-15 16:39:53,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 16:39:53,093 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 454 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:53,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 228 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 16:39:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7151 states. [2022-03-15 16:39:53,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7151 to 3936. [2022-03-15 16:39:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 3.4373570520965693) internal successors, (13526), 3935 states have internal predecessors, (13526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:53,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 13526 transitions. [2022-03-15 16:39:53,175 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 13526 transitions. Word has length 27 [2022-03-15 16:39:53,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:53,175 INFO L470 AbstractCegarLoop]: Abstraction has 3936 states and 13526 transitions. [2022-03-15 16:39:53,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 13526 transitions. [2022-03-15 16:39:53,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 16:39:53,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:53,181 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:53,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 16:39:53,381 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 [2022-03-15 16:39:53,381 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:53,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:53,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1484841794, now seen corresponding path program 33 times [2022-03-15 16:39:53,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:53,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513598322] [2022-03-15 16:39:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:53,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:53,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:53,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:53,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513598322] [2022-03-15 16:39:53,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513598322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:53,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431432510] [2022-03-15 16:39:53,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:39:53,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:53,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:53,423 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:53,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 16:39:53,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 16:39:53,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 16:39:53,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:53,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:53,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431432510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:53,628 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:53,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-03-15 16:39:53,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601814397] [2022-03-15 16:39:53,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:53,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 16:39:53,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:53,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 16:39:53,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-15 16:39:53,629 INFO L87 Difference]: Start difference. First operand 3936 states and 13526 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:54,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:39:54,310 INFO L93 Difference]: Finished difference Result 6859 states and 22528 transitions. [2022-03-15 16:39:54,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 16:39:54,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-03-15 16:39:54,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:39:54,323 INFO L225 Difference]: With dead ends: 6859 [2022-03-15 16:39:54,324 INFO L226 Difference]: Without dead ends: 6843 [2022-03-15 16:39:54,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 16:39:54,324 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 357 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:39:54,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 178 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 16:39:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6843 states. [2022-03-15 16:39:54,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6843 to 3932. [2022-03-15 16:39:54,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 3.435766980412109) internal successors, (13506), 3931 states have internal predecessors, (13506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 13506 transitions. [2022-03-15 16:39:54,400 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 13506 transitions. Word has length 27 [2022-03-15 16:39:54,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:39:54,400 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 13506 transitions. [2022-03-15 16:39:54,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:39:54,400 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 13506 transitions. [2022-03-15 16:39:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:39:54,405 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:39:54,405 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:39:54,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 16:39:54,606 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 [2022-03-15 16:39:54,606 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:39:54,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:39:54,606 INFO L85 PathProgramCache]: Analyzing trace with hash -351559020, now seen corresponding path program 4 times [2022-03-15 16:39:54,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:39:54,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174187831] [2022-03-15 16:39:54,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:39:54,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:39:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:39:54,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:54,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:39:54,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174187831] [2022-03-15 16:39:54,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174187831] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:39:54,945 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057932179] [2022-03-15 16:39:54,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:39:54,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:39:54,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:39:54,947 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:39:54,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 16:39:54,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:39:54,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:39:54,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:39:54,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:39:55,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:39:55,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:39:55,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:39:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:55,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:39:55,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:55,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:39:55,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:55,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:55,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:39:56,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:56,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:56,068 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:56,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:39:56,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:56,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:39:56,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:39:56,088 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 23 treesize of output 50 [2022-03-15 16:39:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:39:56,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057932179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:39:56,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:39:56,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-15 16:39:56,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787985917] [2022-03-15 16:39:56,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:39:56,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:39:56,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:39:56,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:39:56,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:39:56,410 INFO L87 Difference]: Start difference. First operand 3932 states and 13506 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:00,657 INFO L93 Difference]: Finished difference Result 8329 states and 25902 transitions. [2022-03-15 16:40:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:40:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:40:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:00,671 INFO L225 Difference]: With dead ends: 8329 [2022-03-15 16:40:00,671 INFO L226 Difference]: Without dead ends: 8299 [2022-03-15 16:40:00,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1360, Invalid=6296, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:40:00,672 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 732 mSDsluCounter, 884 mSDsCounter, 0 mSdLazyCounter, 2290 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 2290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:00,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [732 Valid, 409 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 2290 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:40:00,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2022-03-15 16:40:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 4021. [2022-03-15 16:40:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4021 states, 4020 states have (on average 3.435820895522388) internal successors, (13812), 4020 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:00,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4021 states to 4021 states and 13812 transitions. [2022-03-15 16:40:00,772 INFO L78 Accepts]: Start accepts. Automaton has 4021 states and 13812 transitions. Word has length 30 [2022-03-15 16:40:00,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:00,772 INFO L470 AbstractCegarLoop]: Abstraction has 4021 states and 13812 transitions. [2022-03-15 16:40:00,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand 4021 states and 13812 transitions. [2022-03-15 16:40:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:00,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:00,778 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:00,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:00,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 16:40:00,979 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1818932088, now seen corresponding path program 5 times [2022-03-15 16:40:00,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:00,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211754231] [2022-03-15 16:40:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:00,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:01,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:01,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211754231] [2022-03-15 16:40:01,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211754231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:01,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410235354] [2022-03-15 16:40:01,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:40:01,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:01,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:01,318 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:01,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 16:40:01,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:40:01,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:01,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:40:01,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:01,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:01,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:01,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 16:40:01,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:01,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:40:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:02,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:02,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:40:02,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:02,159 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:02,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:40:02,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:02,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:02,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:02,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:40:02,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:02,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:02,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:02,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:40:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:02,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410235354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:02,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:02,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-15 16:40:02,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127683089] [2022-03-15 16:40:02,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:02,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:40:02,729 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:02,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:40:02,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:40:02,730 INFO L87 Difference]: Start difference. First operand 4021 states and 13812 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:08,394 INFO L93 Difference]: Finished difference Result 8680 states and 26713 transitions. [2022-03-15 16:40:08,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:40:08,394 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-15 16:40:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:08,409 INFO L225 Difference]: With dead ends: 8680 [2022-03-15 16:40:08,409 INFO L226 Difference]: Without dead ends: 8635 [2022-03-15 16:40:08,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3605 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1623, Invalid=9297, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:40:08,410 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 642 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 2786 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 2998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 2786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:08,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 610 Invalid, 2998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 2786 Invalid, 0 Unknown, 36 Unchecked, 1.5s Time] [2022-03-15 16:40:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8635 states. [2022-03-15 16:40:08,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8635 to 4035. [2022-03-15 16:40:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 4034 states have (on average 3.4338125929598413) internal successors, (13852), 4034 states have internal predecessors, (13852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 13852 transitions. [2022-03-15 16:40:08,515 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 13852 transitions. Word has length 30 [2022-03-15 16:40:08,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:08,516 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 13852 transitions. [2022-03-15 16:40:08,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:08,516 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 13852 transitions. [2022-03-15 16:40:08,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:08,521 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:08,521 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:08,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 16:40:08,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-15 16:40:08,722 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash 924875788, now seen corresponding path program 6 times [2022-03-15 16:40:08,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:08,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500874300] [2022-03-15 16:40:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:09,044 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:09,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500874300] [2022-03-15 16:40:09,044 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500874300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:09,044 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926121935] [2022-03-15 16:40:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:40:09,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:09,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:09,045 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:09,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 16:40:09,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:40:09,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:09,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:40:09,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:09,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-15 16:40:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:09,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:09,553 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-15 16:40:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:09,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:10,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:10,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:10,110 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:10,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:40:10,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:10,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:10,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:10,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-03-15 16:40:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:10,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926121935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:10,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:10,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-15 16:40:10,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474064743] [2022-03-15 16:40:10,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:10,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:40:10,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:10,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:40:10,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:40:10,449 INFO L87 Difference]: Start difference. First operand 4035 states and 13852 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-03-15 16:40:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:19,792 INFO L93 Difference]: Finished difference Result 11498 states and 38537 transitions. [2022-03-15 16:40:19,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-03-15 16:40:19,792 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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 30 [2022-03-15 16:40:19,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:19,814 INFO L225 Difference]: With dead ends: 11498 [2022-03-15 16:40:19,814 INFO L226 Difference]: Without dead ends: 11484 [2022-03-15 16:40:19,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12006 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2573, Invalid=29289, Unknown=0, NotChecked=0, Total=31862 [2022-03-15 16:40:19,816 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 522 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1697 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:19,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 989 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2784 Invalid, 0 Unknown, 1697 Unchecked, 1.4s Time] [2022-03-15 16:40:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11484 states. [2022-03-15 16:40:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11484 to 4122. [2022-03-15 16:40:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4122 states, 4121 states have (on average 3.433875272991992) internal successors, (14151), 4121 states have internal predecessors, (14151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 14151 transitions. [2022-03-15 16:40:19,965 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 14151 transitions. Word has length 30 [2022-03-15 16:40:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:19,965 INFO L470 AbstractCegarLoop]: Abstraction has 4122 states and 14151 transitions. [2022-03-15 16:40:19,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-03-15 16:40:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 14151 transitions. [2022-03-15 16:40:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:19,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:19,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:19,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 16:40:20,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 16:40:20,171 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash -575152710, now seen corresponding path program 7 times [2022-03-15 16:40:20,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:20,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892415605] [2022-03-15 16:40:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:20,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:20,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892415605] [2022-03-15 16:40:20,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892415605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:20,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014291670] [2022-03-15 16:40:20,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:40:20,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:20,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:20,552 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:20,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 16:40:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:40:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:20,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:40:20,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:20,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:20,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:40:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:21,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:21,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:21,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:21,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:40:21,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:21,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:21,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:40:21,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:21,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:21,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:21,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:40:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:21,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:21,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:21,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:40:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:22,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014291670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:22,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:22,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-15 16:40:22,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065206894] [2022-03-15 16:40:22,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:22,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:40:22,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:22,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:40:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:40:22,028 INFO L87 Difference]: Start difference. First operand 4122 states and 14151 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:26,131 INFO L93 Difference]: Finished difference Result 8424 states and 26234 transitions. [2022-03-15 16:40:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:40:26,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:40:26,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:26,146 INFO L225 Difference]: With dead ends: 8424 [2022-03-15 16:40:26,146 INFO L226 Difference]: Without dead ends: 8394 [2022-03-15 16:40:26,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1367, Invalid=6115, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:40:26,147 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 687 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:26,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [687 Valid, 454 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2161 Invalid, 0 Unknown, 198 Unchecked, 1.1s Time] [2022-03-15 16:40:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8394 states. [2022-03-15 16:40:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8394 to 4114. [2022-03-15 16:40:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4114 states, 4113 states have (on average 3.4354485776805253) internal successors, (14130), 4113 states have internal predecessors, (14130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 14130 transitions. [2022-03-15 16:40:26,225 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 14130 transitions. Word has length 30 [2022-03-15 16:40:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:26,225 INFO L470 AbstractCegarLoop]: Abstraction has 4114 states and 14130 transitions. [2022-03-15 16:40:26,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 14130 transitions. [2022-03-15 16:40:26,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:26,231 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:26,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:26,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-15 16:40:26,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-15 16:40:26,431 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2126312130, now seen corresponding path program 8 times [2022-03-15 16:40:26,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:26,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36540517] [2022-03-15 16:40:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:26,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:26,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36540517] [2022-03-15 16:40:26,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36540517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:26,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116985107] [2022-03-15 16:40:26,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:40:26,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:26,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:26,748 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:26,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 16:40:26,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:40:26,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:26,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:40:26,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:27,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:27,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:40:27,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:40:27,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:27,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:27,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:40:27,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:27,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:40:27,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:27,818 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 60 [2022-03-15 16:40:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:27,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:27,838 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 23 treesize of output 50 [2022-03-15 16:40:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:28,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116985107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:28,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:28,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:40:28,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924957963] [2022-03-15 16:40:28,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:28,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:40:28,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:28,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:40:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:28,130 INFO L87 Difference]: Start difference. First operand 4114 states and 14130 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:31,974 INFO L93 Difference]: Finished difference Result 8384 states and 26123 transitions. [2022-03-15 16:40:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:40:31,975 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 30 [2022-03-15 16:40:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:31,988 INFO L225 Difference]: With dead ends: 8384 [2022-03-15 16:40:31,989 INFO L226 Difference]: Without dead ends: 8369 [2022-03-15 16:40:31,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1326, Invalid=5646, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:40:31,989 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 787 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:31,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 345 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1601 Invalid, 0 Unknown, 183 Unchecked, 0.9s Time] [2022-03-15 16:40:31,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8369 states. [2022-03-15 16:40:32,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8369 to 4108. [2022-03-15 16:40:32,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4108 states, 4107 states have (on average 3.436571706841977) internal successors, (14114), 4107 states have internal predecessors, (14114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4108 states to 4108 states and 14114 transitions. [2022-03-15 16:40:32,073 INFO L78 Accepts]: Start accepts. Automaton has 4108 states and 14114 transitions. Word has length 30 [2022-03-15 16:40:32,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:32,073 INFO L470 AbstractCegarLoop]: Abstraction has 4108 states and 14114 transitions. [2022-03-15 16:40:32,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:32,073 INFO L276 IsEmpty]: Start isEmpty. Operand 4108 states and 14114 transitions. [2022-03-15 16:40:32,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:32,078 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:32,078 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:32,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 16:40:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:32,280 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 568392223, now seen corresponding path program 34 times [2022-03-15 16:40:32,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:32,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327127296] [2022-03-15 16:40:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:32,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:32,735 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:32,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:32,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327127296] [2022-03-15 16:40:32,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327127296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:32,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878049303] [2022-03-15 16:40:32,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:40:32,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:32,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:32,740 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:32,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 16:40:32,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:40:32,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:32,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:40:32,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:33,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:33,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 16:40:33,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:33,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-15 16:40:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:33,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:33,477 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:33,477 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 38 treesize of output 63 [2022-03-15 16:40:33,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:33,495 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 26 treesize of output 55 [2022-03-15 16:40:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:33,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:40:33,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:33,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:40:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:33,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878049303] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:33,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:33,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-15 16:40:33,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32664751] [2022-03-15 16:40:33,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:33,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:40:33,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:40:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:33,705 INFO L87 Difference]: Start difference. First operand 4108 states and 14114 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:40:41,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:41,579 INFO L93 Difference]: Finished difference Result 7526 states and 24784 transitions. [2022-03-15 16:40:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:40:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 30 [2022-03-15 16:40:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:41,592 INFO L225 Difference]: With dead ends: 7526 [2022-03-15 16:40:41,592 INFO L226 Difference]: Without dead ends: 7479 [2022-03-15 16:40:41,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5574 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2059, Invalid=14197, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 16:40:41,593 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 495 mSDsluCounter, 1035 mSDsCounter, 0 mSdLazyCounter, 2941 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:41,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 483 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 2941 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:40:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2022-03-15 16:40:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 4187. [2022-03-15 16:40:41,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 4186 states have (on average 3.4257047300525563) internal successors, (14340), 4186 states have internal predecessors, (14340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 14340 transitions. [2022-03-15 16:40:41,674 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 14340 transitions. Word has length 30 [2022-03-15 16:40:41,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:41,674 INFO L470 AbstractCegarLoop]: Abstraction has 4187 states and 14340 transitions. [2022-03-15 16:40:41,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:40:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 14340 transitions. [2022-03-15 16:40:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:41,680 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:41,680 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:41,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 16:40:41,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:41,903 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:41,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:41,903 INFO L85 PathProgramCache]: Analyzing trace with hash 757290426, now seen corresponding path program 9 times [2022-03-15 16:40:41,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:41,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864395708] [2022-03-15 16:40:41,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:41,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:42,236 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:42,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:42,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864395708] [2022-03-15 16:40:42,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864395708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:42,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458336811] [2022-03-15 16:40:42,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:40:42,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:42,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:42,238 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:42,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 16:40:42,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:40:42,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:42,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:40:42,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:42,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:42,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 32 [2022-03-15 16:40:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:42,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:40:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:42,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:43,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:43,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 93 [2022-03-15 16:40:43,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:43,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2022-03-15 16:40:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:44,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458336811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:44,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:44,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:40:44,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941555721] [2022-03-15 16:40:44,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:44,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:40:44,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:44,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:40:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:40:44,283 INFO L87 Difference]: Start difference. First operand 4187 states and 14340 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:40:48,612 INFO L93 Difference]: Finished difference Result 8543 states and 26702 transitions. [2022-03-15 16:40:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 16:40:48,613 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 30 [2022-03-15 16:40:48,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:40:48,628 INFO L225 Difference]: With dead ends: 8543 [2022-03-15 16:40:48,628 INFO L226 Difference]: Without dead ends: 8529 [2022-03-15 16:40:48,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 41 SyntacticMatches, 16 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3020 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1404, Invalid=5736, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 16:40:48,629 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 615 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 555 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:40:48,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 439 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1197 Invalid, 0 Unknown, 555 Unchecked, 0.7s Time] [2022-03-15 16:40:48,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8529 states. [2022-03-15 16:40:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8529 to 4221. [2022-03-15 16:40:48,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4221 states, 4220 states have (on average 3.427962085308057) internal successors, (14466), 4220 states have internal predecessors, (14466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:48,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4221 states to 4221 states and 14466 transitions. [2022-03-15 16:40:48,721 INFO L78 Accepts]: Start accepts. Automaton has 4221 states and 14466 transitions. Word has length 30 [2022-03-15 16:40:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:40:48,721 INFO L470 AbstractCegarLoop]: Abstraction has 4221 states and 14466 transitions. [2022-03-15 16:40:48,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:40:48,721 INFO L276 IsEmpty]: Start isEmpty. Operand 4221 states and 14466 transitions. [2022-03-15 16:40:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:40:48,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:40:48,727 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:40:48,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 16:40:48,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 16:40:48,928 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:40:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:40:48,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1555957713, now seen corresponding path program 35 times [2022-03-15 16:40:48,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:40:48,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902898148] [2022-03-15 16:40:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:40:48,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:40:48,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:40:49,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:49,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:40:49,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902898148] [2022-03-15 16:40:49,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902898148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:40:49,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548227535] [2022-03-15 16:40:49,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:40:49,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:40:49,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:40:49,427 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:40:49,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 16:40:49,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:40:49,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:40:49,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:40:49,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:40:49,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:49,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:49,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:49,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 16:40:49,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:49,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:49,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:49,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-15 16:40:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:40:50,150 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:40:50,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:40:50,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:40:50,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-15 16:40:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:50,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:40:50,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:40:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:40:50,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:40:50,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:40:50,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548227535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:40:50,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:40:50,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-15 16:40:50,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2701723] [2022-03-15 16:40:50,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:40:50,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:40:50,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:40:50,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:40:50,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:40:50,357 INFO L87 Difference]: Start difference. First operand 4221 states and 14466 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:07,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:07,396 INFO L93 Difference]: Finished difference Result 9601 states and 31192 transitions. [2022-03-15 16:41:07,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-03-15 16:41:07,396 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:41:07,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:07,413 INFO L225 Difference]: With dead ends: 9601 [2022-03-15 16:41:07,413 INFO L226 Difference]: Without dead ends: 9554 [2022-03-15 16:41:07,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15147 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5253, Invalid=32577, Unknown=0, NotChecked=0, Total=37830 [2022-03-15 16:41:07,415 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 839 mSDsluCounter, 1849 mSDsCounter, 0 mSdLazyCounter, 5020 mSolverCounterSat, 667 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 5687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 667 IncrementalHoareTripleChecker+Valid, 5020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:07,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 959 Invalid, 5687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [667 Valid, 5020 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-15 16:41:07,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9554 states. [2022-03-15 16:41:07,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9554 to 4250. [2022-03-15 16:41:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4250 states, 4249 states have (on average 3.4304542245234173) internal successors, (14576), 4249 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:07,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4250 states to 4250 states and 14576 transitions. [2022-03-15 16:41:07,509 INFO L78 Accepts]: Start accepts. Automaton has 4250 states and 14576 transitions. Word has length 30 [2022-03-15 16:41:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:07,509 INFO L470 AbstractCegarLoop]: Abstraction has 4250 states and 14576 transitions. [2022-03-15 16:41:07,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 4250 states and 14576 transitions. [2022-03-15 16:41:07,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:07,516 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:07,516 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:07,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:07,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 16:41:07,731 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:07,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1067437025, now seen corresponding path program 36 times [2022-03-15 16:41:07,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:07,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253855660] [2022-03-15 16:41:07,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:07,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:08,114 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:08,115 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:08,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253855660] [2022-03-15 16:41:08,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253855660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:08,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411032562] [2022-03-15 16:41:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:41:08,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:08,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:08,116 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:08,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 16:41:08,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:41:08,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:08,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:41:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:08,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:08,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:08,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:08,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-03-15 16:41:08,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:08,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:08,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 113 [2022-03-15 16:41:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:08,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:08,944 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:41:08,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:41:08,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:08,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:08,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:08,962 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 26 treesize of output 55 [2022-03-15 16:41:09,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:41:09,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:09,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:09,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:41:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:09,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411032562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:09,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:09,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-03-15 16:41:09,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057667176] [2022-03-15 16:41:09,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:09,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:41:09,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:41:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:41:09,156 INFO L87 Difference]: Start difference. First operand 4250 states and 14576 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) [2022-03-15 16:41:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:41:56,773 INFO L93 Difference]: Finished difference Result 16610 states and 52058 transitions. [2022-03-15 16:41:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 507 states. [2022-03-15 16:41:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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 30 [2022-03-15 16:41:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:41:56,806 INFO L225 Difference]: With dead ends: 16610 [2022-03-15 16:41:56,806 INFO L226 Difference]: Without dead ends: 16541 [2022-03-15 16:41:56,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 528 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128956 ImplicationChecksByTransitivity, 41.8s TimeCoverageRelationStatistics Valid=22921, Invalid=257449, Unknown=0, NotChecked=0, Total=280370 [2022-03-15 16:41:56,817 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 1751 mSDsluCounter, 3662 mSDsCounter, 0 mSdLazyCounter, 9768 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1751 SdHoareTripleChecker+Valid, 2177 SdHoareTripleChecker+Invalid, 10903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 9768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:41:56,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1751 Valid, 2177 Invalid, 10903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 9768 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-03-15 16:41:56,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16541 states. [2022-03-15 16:41:56,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16541 to 4659. [2022-03-15 16:41:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 3.4257191927866035) internal successors, (15957), 4658 states have internal predecessors, (15957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:41:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 15957 transitions. [2022-03-15 16:41:56,991 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 15957 transitions. Word has length 30 [2022-03-15 16:41:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:41:56,991 INFO L470 AbstractCegarLoop]: Abstraction has 4659 states and 15957 transitions. [2022-03-15 16:41:56,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) [2022-03-15 16:41:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 15957 transitions. [2022-03-15 16:41:56,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:41:56,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:41:56,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:41:57,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 16:41:57,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-15 16:41:57,198 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:41:57,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:41:57,198 INFO L85 PathProgramCache]: Analyzing trace with hash 602852908, now seen corresponding path program 10 times [2022-03-15 16:41:57,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:41:57,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296502125] [2022-03-15 16:41:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:41:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:41:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:41:57,604 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:57,604 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:41:57,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296502125] [2022-03-15 16:41:57,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296502125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:41:57,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047596211] [2022-03-15 16:41:57,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:41:57,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:41:57,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:41:57,605 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:41:57,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 16:41:57,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:41:57,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:41:57,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:41:57,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:41:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:57,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:57,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 16:41:57,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:41:57,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:57,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-03-15 16:41:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:58,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:41:58,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:41:58,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:41:58,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,626 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:41:58,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:41:58,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:41:58,647 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 23 treesize of output 50 [2022-03-15 16:41:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:41:58,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047596211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:41:58,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:41:58,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-15 16:41:58,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289596986] [2022-03-15 16:41:58,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:41:58,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:41:58,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:41:58,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:41:58,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:41:58,904 INFO L87 Difference]: Start difference. First operand 4659 states and 15957 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:04,311 INFO L93 Difference]: Finished difference Result 9848 states and 30439 transitions. [2022-03-15 16:42:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 16:42:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:04,329 INFO L225 Difference]: With dead ends: 9848 [2022-03-15 16:42:04,329 INFO L226 Difference]: Without dead ends: 9818 [2022-03-15 16:42:04,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3791 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1927, Invalid=8579, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 16:42:04,330 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 872 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:04,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 426 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2106 Invalid, 0 Unknown, 91 Unchecked, 1.2s Time] [2022-03-15 16:42:04,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9818 states. [2022-03-15 16:42:04,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9818 to 4649. [2022-03-15 16:42:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 3.4242685025817554) internal successors, (15916), 4648 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 15916 transitions. [2022-03-15 16:42:04,426 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 15916 transitions. Word has length 30 [2022-03-15 16:42:04,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:04,426 INFO L470 AbstractCegarLoop]: Abstraction has 4649 states and 15916 transitions. [2022-03-15 16:42:04,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:04,426 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 15916 transitions. [2022-03-15 16:42:04,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:04,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:04,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:04,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:04,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:04,633 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:04,634 INFO L85 PathProgramCache]: Analyzing trace with hash -92028696, now seen corresponding path program 11 times [2022-03-15 16:42:04,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:04,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229552775] [2022-03-15 16:42:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:04,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:04,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:04,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229552775] [2022-03-15 16:42:04,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229552775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:04,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906349677] [2022-03-15 16:42:04,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:04,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:04,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:04,960 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:04,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 16:42:04,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:04,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:04,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:42:04,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:05,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:05,268 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:05,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 16:42:05,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-15 16:42:05,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:05,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:05,668 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:42:05,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:42:05,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:05,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:05,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:42:06,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:06,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:42:06,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:06,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:06,060 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 23 treesize of output 50 [2022-03-15 16:42:06,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:06,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906349677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:06,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:06,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 16:42:06,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122786300] [2022-03-15 16:42:06,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:06,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:06,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:06,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:06,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:06,263 INFO L87 Difference]: Start difference. First operand 4649 states and 15916 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:13,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:13,697 INFO L93 Difference]: Finished difference Result 9928 states and 31296 transitions. [2022-03-15 16:42:13,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-15 16:42:13,697 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:13,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:13,716 INFO L225 Difference]: With dead ends: 9928 [2022-03-15 16:42:13,716 INFO L226 Difference]: Without dead ends: 9869 [2022-03-15 16:42:13,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4529 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=1655, Invalid=11917, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 16:42:13,717 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 721 mSDsluCounter, 1153 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 653 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:13,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 697 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 2964 Invalid, 0 Unknown, 653 Unchecked, 1.7s Time] [2022-03-15 16:42:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9869 states. [2022-03-15 16:42:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9869 to 4696. [2022-03-15 16:42:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4695 states have (on average 3.428541001064963) internal successors, (16097), 4695 states have internal predecessors, (16097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 16097 transitions. [2022-03-15 16:42:13,830 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 16097 transitions. Word has length 30 [2022-03-15 16:42:13,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:13,831 INFO L470 AbstractCegarLoop]: Abstraction has 4696 states and 16097 transitions. [2022-03-15 16:42:13,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:13,831 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 16097 transitions. [2022-03-15 16:42:13,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:13,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:13,837 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:13,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 16:42:14,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 16:42:14,037 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:14,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash 112845316, now seen corresponding path program 12 times [2022-03-15 16:42:14,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:14,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455189341] [2022-03-15 16:42:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:14,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:14,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:14,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455189341] [2022-03-15 16:42:14,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455189341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:14,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555465765] [2022-03-15 16:42:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:14,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:14,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:14,375 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:14,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 16:42:14,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:14,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:42:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:14,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:14,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 32 [2022-03-15 16:42:14,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:14,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:42:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:14,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:15,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:42:15,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:42:15,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:42:15,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:15,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:15,497 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 23 treesize of output 50 [2022-03-15 16:42:15,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:15,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555465765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:15,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:15,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-15 16:42:15,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62938574] [2022-03-15 16:42:15,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:15,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:15,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:15,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:15,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:15,742 INFO L87 Difference]: Start difference. First operand 4696 states and 16097 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:20,412 INFO L93 Difference]: Finished difference Result 8928 states and 28034 transitions. [2022-03-15 16:42:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:42:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:20,431 INFO L225 Difference]: With dead ends: 8928 [2022-03-15 16:42:20,431 INFO L226 Difference]: Without dead ends: 8898 [2022-03-15 16:42:20,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1511, Invalid=7231, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:42:20,432 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 580 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:20,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 407 Invalid, 2655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:42:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2022-03-15 16:42:20,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 4722. [2022-03-15 16:42:20,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4722 states, 4721 states have (on average 3.4257572548188944) internal successors, (16173), 4721 states have internal predecessors, (16173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:20,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4722 states to 4722 states and 16173 transitions. [2022-03-15 16:42:20,543 INFO L78 Accepts]: Start accepts. Automaton has 4722 states and 16173 transitions. Word has length 30 [2022-03-15 16:42:20,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:20,543 INFO L470 AbstractCegarLoop]: Abstraction has 4722 states and 16173 transitions. [2022-03-15 16:42:20,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:20,543 INFO L276 IsEmpty]: Start isEmpty. Operand 4722 states and 16173 transitions. [2022-03-15 16:42:20,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:20,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:20,552 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:20,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:20,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:20,752 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:20,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1513260232, now seen corresponding path program 13 times [2022-03-15 16:42:20,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:20,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101931108] [2022-03-15 16:42:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:20,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:21,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:21,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101931108] [2022-03-15 16:42:21,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101931108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:21,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67495484] [2022-03-15 16:42:21,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:42:21,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:21,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:21,104 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:21,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 16:42:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:21,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:42:21,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:21,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:21,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:21,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:42:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:21,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:21,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:42:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:21,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:21,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:21,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:21,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:42:21,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:21,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:21,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:42:22,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:22,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:22,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:22,195 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 60 [2022-03-15 16:42:22,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:22,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:22,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:22,214 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 23 treesize of output 50 [2022-03-15 16:42:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:22,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67495484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:22,441 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:22,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 32 [2022-03-15 16:42:22,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413921476] [2022-03-15 16:42:22,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:22,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:42:22,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:22,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:42:22,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:42:22,442 INFO L87 Difference]: Start difference. First operand 4722 states and 16173 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:26,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:26,726 INFO L93 Difference]: Finished difference Result 8815 states and 27750 transitions. [2022-03-15 16:42:26,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-15 16:42:26,727 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:26,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:26,742 INFO L225 Difference]: With dead ends: 8815 [2022-03-15 16:42:26,742 INFO L226 Difference]: Without dead ends: 8785 [2022-03-15 16:42:26,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3089 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1538, Invalid=7204, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:42:26,743 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 580 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 2500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:26,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 407 Invalid, 2500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 2272 Invalid, 0 Unknown, 29 Unchecked, 1.2s Time] [2022-03-15 16:42:26,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2022-03-15 16:42:26,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 4729. [2022-03-15 16:42:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4728 states have (on average 3.425549915397631) internal successors, (16196), 4728 states have internal predecessors, (16196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 16196 transitions. [2022-03-15 16:42:26,834 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 16196 transitions. Word has length 30 [2022-03-15 16:42:26,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:26,834 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 16196 transitions. [2022-03-15 16:42:26,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:26,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 16196 transitions. [2022-03-15 16:42:26,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:26,867 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:26,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:26,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:27,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 16:42:27,083 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:27,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1537927686, now seen corresponding path program 14 times [2022-03-15 16:42:27,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:27,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489494147] [2022-03-15 16:42:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:27,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:27,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:27,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:27,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489494147] [2022-03-15 16:42:27,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489494147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:27,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117657108] [2022-03-15 16:42:27,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:42:27,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:27,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:27,453 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:27,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 16:42:27,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:42:27,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:27,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:42:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:27,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:27,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2022-03-15 16:42:27,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:27,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:42:27,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:27,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:28,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:28,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:28,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:42:28,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:28,191 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:28,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:42:28,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:28,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:28,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:28,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:42:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:28,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:28,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:28,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:42:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:28,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117657108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:28,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:28,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:42:28,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200955972] [2022-03-15 16:42:28,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:28,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:28,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:28,834 INFO L87 Difference]: Start difference. First operand 4729 states and 16196 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:33,049 INFO L93 Difference]: Finished difference Result 8821 states and 27736 transitions. [2022-03-15 16:42:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:42:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 30 [2022-03-15 16:42:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:33,066 INFO L225 Difference]: With dead ends: 8821 [2022-03-15 16:42:33,066 INFO L226 Difference]: Without dead ends: 8807 [2022-03-15 16:42:33,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2885 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1492, Invalid=6698, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 16:42:33,067 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 578 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 2156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:33,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 338 Invalid, 2156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1923 Invalid, 0 Unknown, 34 Unchecked, 1.1s Time] [2022-03-15 16:42:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8807 states. [2022-03-15 16:42:33,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8807 to 4729. [2022-03-15 16:42:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4728 states have (on average 3.425549915397631) internal successors, (16196), 4728 states have internal predecessors, (16196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 16196 transitions. [2022-03-15 16:42:33,183 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 16196 transitions. Word has length 30 [2022-03-15 16:42:33,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:33,183 INFO L470 AbstractCegarLoop]: Abstraction has 4729 states and 16196 transitions. [2022-03-15 16:42:33,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:33,183 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 16196 transitions. [2022-03-15 16:42:33,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:33,189 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:33,189 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:33,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 16:42:33,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 16:42:33,390 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:33,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1205880190, now seen corresponding path program 15 times [2022-03-15 16:42:33,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:33,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809751103] [2022-03-15 16:42:33,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:33,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:33,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:33,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809751103] [2022-03-15 16:42:33,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809751103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:33,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317840800] [2022-03-15 16:42:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:42:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:33,702 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:33,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 16:42:33,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:42:33,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:33,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:42:33,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:34,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:34,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:34,195 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 31 treesize of output 23 [2022-03-15 16:42:34,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:34,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:42:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:34,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:34,547 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:34,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 93 [2022-03-15 16:42:34,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:34,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2022-03-15 16:42:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:35,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317840800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:35,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:35,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:42:35,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236683018] [2022-03-15 16:42:35,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:35,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:42:35,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:42:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:42:35,712 INFO L87 Difference]: Start difference. First operand 4729 states and 16196 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:39,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:39,038 INFO L93 Difference]: Finished difference Result 8618 states and 27320 transitions. [2022-03-15 16:42:39,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 16:42:39,039 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 30 [2022-03-15 16:42:39,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:39,054 INFO L225 Difference]: With dead ends: 8618 [2022-03-15 16:42:39,055 INFO L226 Difference]: Without dead ends: 8603 [2022-03-15 16:42:39,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1221, Invalid=5259, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 16:42:39,055 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 405 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 794 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:39,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 384 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1177 Invalid, 0 Unknown, 794 Unchecked, 0.7s Time] [2022-03-15 16:42:39,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8603 states. [2022-03-15 16:42:39,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8603 to 4707. [2022-03-15 16:42:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4706 states have (on average 3.4271143221419464) internal successors, (16128), 4706 states have internal predecessors, (16128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 16128 transitions. [2022-03-15 16:42:39,145 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 16128 transitions. Word has length 30 [2022-03-15 16:42:39,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:39,145 INFO L470 AbstractCegarLoop]: Abstraction has 4707 states and 16128 transitions. [2022-03-15 16:42:39,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:39,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 16128 transitions. [2022-03-15 16:42:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:39,151 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:39,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:39,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 16:42:39,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:39,352 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:39,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:39,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1894737772, now seen corresponding path program 16 times [2022-03-15 16:42:39,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:39,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298018338] [2022-03-15 16:42:39,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:39,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:39,697 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:39,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298018338] [2022-03-15 16:42:39,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298018338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:39,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332322940] [2022-03-15 16:42:39,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:42:39,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:39,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:39,704 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:39,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 16:42:39,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:42:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:42:39,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:40,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:40,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-15 16:42:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 16:42:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:40,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:40,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:40,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:42:40,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:40,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:42:40,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:40,793 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 60 [2022-03-15 16:42:40,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:40,812 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:40,812 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 23 treesize of output 50 [2022-03-15 16:42:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:41,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332322940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:41,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:41,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-15 16:42:41,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844677475] [2022-03-15 16:42:41,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:41,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:42:41,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:41,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:42:41,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:42:41,041 INFO L87 Difference]: Start difference. First operand 4707 states and 16128 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:46,786 INFO L93 Difference]: Finished difference Result 9415 states and 29580 transitions. [2022-03-15 16:42:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:42:46,786 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:46,803 INFO L225 Difference]: With dead ends: 9415 [2022-03-15 16:42:46,803 INFO L226 Difference]: Without dead ends: 9385 [2022-03-15 16:42:46,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4610 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2081, Invalid=10351, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 16:42:46,804 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 742 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 2862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:46,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [742 Valid, 457 Invalid, 2862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-15 16:42:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9385 states. [2022-03-15 16:42:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9385 to 4740. [2022-03-15 16:42:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4740 states, 4739 states have (on average 3.4317366533023845) internal successors, (16263), 4739 states have internal predecessors, (16263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4740 states to 4740 states and 16263 transitions. [2022-03-15 16:42:46,919 INFO L78 Accepts]: Start accepts. Automaton has 4740 states and 16263 transitions. Word has length 30 [2022-03-15 16:42:46,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:46,919 INFO L470 AbstractCegarLoop]: Abstraction has 4740 states and 16263 transitions. [2022-03-15 16:42:46,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:46,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4740 states and 16263 transitions. [2022-03-15 16:42:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:46,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:46,925 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:46,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 16:42:47,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 16:42:47,126 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:47,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:47,126 INFO L85 PathProgramCache]: Analyzing trace with hash -260258954, now seen corresponding path program 17 times [2022-03-15 16:42:47,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:47,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609067314] [2022-03-15 16:42:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:47,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:47,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609067314] [2022-03-15 16:42:47,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609067314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:47,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688820030] [2022-03-15 16:42:47,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:42:47,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:47,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:47,476 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:47,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 16:42:47,499 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:42:47,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:42:47,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:47,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:47,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:47,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 40 treesize of output 32 [2022-03-15 16:42:47,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:47,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 16:42:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:48,165 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:42:48,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 69 [2022-03-15 16:42:48,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:48,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:48,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:42:48,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:48,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:48,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:48,519 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 60 [2022-03-15 16:42:48,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:48,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:48,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:48,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:42:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:48,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688820030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:48,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:48,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:42:48,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410427548] [2022-03-15 16:42:48,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:48,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:42:48,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:42:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:42:48,771 INFO L87 Difference]: Start difference. First operand 4740 states and 16263 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:57,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:42:57,232 INFO L93 Difference]: Finished difference Result 9485 states and 30401 transitions. [2022-03-15 16:42:57,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 16:42:57,233 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:42:57,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:42:57,249 INFO L225 Difference]: With dead ends: 9485 [2022-03-15 16:42:57,250 INFO L226 Difference]: Without dead ends: 9451 [2022-03-15 16:42:57,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4862 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1848, Invalid=12672, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:42:57,250 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 680 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 609 SdHoareTripleChecker+Invalid, 3853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:42:57,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 609 Invalid, 3853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:42:57,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2022-03-15 16:42:57,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 4797. [2022-03-15 16:42:57,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4797 states, 4796 states have (on average 3.4307756463719765) internal successors, (16454), 4796 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:57,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4797 states to 4797 states and 16454 transitions. [2022-03-15 16:42:57,345 INFO L78 Accepts]: Start accepts. Automaton has 4797 states and 16454 transitions. Word has length 30 [2022-03-15 16:42:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:42:57,346 INFO L470 AbstractCegarLoop]: Abstraction has 4797 states and 16454 transitions. [2022-03-15 16:42:57,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:42:57,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4797 states and 16454 transitions. [2022-03-15 16:42:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:42:57,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:42:57,352 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:42:57,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 16:42:57,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 16:42:57,552 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:42:57,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:42:57,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1369414922, now seen corresponding path program 18 times [2022-03-15 16:42:57,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:42:57,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338987144] [2022-03-15 16:42:57,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:42:57,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:42:57,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:42:57,931 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:57,932 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:42:57,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338987144] [2022-03-15 16:42:57,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338987144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:42:57,932 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917017059] [2022-03-15 16:42:57,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:42:57,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:42:57,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:42:57,933 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:42:57,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 16:42:57,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:42:57,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:42:57,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:42:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:42:58,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:58,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:58,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 39 [2022-03-15 16:42:58,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:42:58,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:58,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 73 treesize of output 61 [2022-03-15 16:42:58,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:58,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:42:59,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:59,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 77 [2022-03-15 16:42:59,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:42:59,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:42:59,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 44 treesize of output 61 [2022-03-15 16:42:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:42:59,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917017059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:42:59,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:42:59,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2022-03-15 16:42:59,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056754013] [2022-03-15 16:42:59,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:42:59,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:42:59,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:42:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:42:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:42:59,523 INFO L87 Difference]: Start difference. First operand 4797 states and 16454 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:16,577 INFO L93 Difference]: Finished difference Result 15689 states and 52195 transitions. [2022-03-15 16:43:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 207 states. [2022-03-15 16:43:16,578 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:43:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:16,607 INFO L225 Difference]: With dead ends: 15689 [2022-03-15 16:43:16,608 INFO L226 Difference]: Without dead ends: 15644 [2022-03-15 16:43:16,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20846 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=6531, Invalid=42975, Unknown=0, NotChecked=0, Total=49506 [2022-03-15 16:43:16,610 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 790 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 3715 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 7492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3563 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:16,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 1161 Invalid, 7492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3715 Invalid, 0 Unknown, 3563 Unchecked, 2.1s Time] [2022-03-15 16:43:16,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15644 states. [2022-03-15 16:43:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15644 to 4905. [2022-03-15 16:43:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4905 states, 4904 states have (on average 3.4404567699836868) internal successors, (16872), 4904 states have internal predecessors, (16872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4905 states to 4905 states and 16872 transitions. [2022-03-15 16:43:16,767 INFO L78 Accepts]: Start accepts. Automaton has 4905 states and 16872 transitions. Word has length 30 [2022-03-15 16:43:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:16,767 INFO L470 AbstractCegarLoop]: Abstraction has 4905 states and 16872 transitions. [2022-03-15 16:43:16,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4905 states and 16872 transitions. [2022-03-15 16:43:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:16,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:16,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:16,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 16:43:16,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:16,975 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:16,975 INFO L85 PathProgramCache]: Analyzing trace with hash 436133214, now seen corresponding path program 19 times [2022-03-15 16:43:16,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:16,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596702285] [2022-03-15 16:43:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:16,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:17,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:17,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596702285] [2022-03-15 16:43:17,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596702285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:17,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250186867] [2022-03-15 16:43:17,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:43:17,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:17,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:17,343 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:17,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 16:43:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:17,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:17,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:17,771 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:17,771 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-03-15 16:43:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:17,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:17,778 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-15 16:43:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:17,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:18,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:18,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:43:18,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:18,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:43:18,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:18,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:43:18,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:18,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:18,526 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 23 treesize of output 50 [2022-03-15 16:43:18,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:18,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250186867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:18,752 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:18,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-03-15 16:43:18,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591149593] [2022-03-15 16:43:18,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:18,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:18,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:18,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:18,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:18,753 INFO L87 Difference]: Start difference. First operand 4905 states and 16872 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:24,797 INFO L93 Difference]: Finished difference Result 9970 states and 31516 transitions. [2022-03-15 16:43:24,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 16:43:24,797 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:43:24,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:24,815 INFO L225 Difference]: With dead ends: 9970 [2022-03-15 16:43:24,815 INFO L226 Difference]: Without dead ends: 9940 [2022-03-15 16:43:24,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2292, Invalid=10590, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 16:43:24,816 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 807 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 2484 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 2484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:24,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 649 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 2484 Invalid, 0 Unknown, 388 Unchecked, 1.4s Time] [2022-03-15 16:43:24,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9940 states. [2022-03-15 16:43:24,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9940 to 4932. [2022-03-15 16:43:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4932 states, 4931 states have (on average 3.445548570269722) internal successors, (16990), 4931 states have internal predecessors, (16990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4932 states to 4932 states and 16990 transitions. [2022-03-15 16:43:24,953 INFO L78 Accepts]: Start accepts. Automaton has 4932 states and 16990 transitions. Word has length 30 [2022-03-15 16:43:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:24,953 INFO L470 AbstractCegarLoop]: Abstraction has 4932 states and 16990 transitions. [2022-03-15 16:43:24,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4932 states and 16990 transitions. [2022-03-15 16:43:24,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:24,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:24,960 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:24,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 16:43:25,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:25,161 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:25,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:25,161 INFO L85 PathProgramCache]: Analyzing trace with hash 608056734, now seen corresponding path program 20 times [2022-03-15 16:43:25,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:25,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500040720] [2022-03-15 16:43:25,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:25,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:25,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:25,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500040720] [2022-03-15 16:43:25,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500040720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:25,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120946394] [2022-03-15 16:43:25,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:43:25,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:25,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:25,497 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:25,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 16:43:25,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:43:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:43:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:25,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:25,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-03-15 16:43:25,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-03-15 16:43:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:25,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:26,205 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:43:26,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:43:26,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:26,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:43:26,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:26,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:43:26,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:26,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:26,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:43:26,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:26,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120946394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:26,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:26,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 16:43:26,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169954529] [2022-03-15 16:43:26,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:26,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:26,873 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:26,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:26,874 INFO L87 Difference]: Start difference. First operand 4932 states and 16990 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2022-03-15 16:43:34,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:34,822 INFO L93 Difference]: Finished difference Result 10167 states and 32691 transitions. [2022-03-15 16:43:34,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 16:43:34,823 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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 30 [2022-03-15 16:43:34,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:34,840 INFO L225 Difference]: With dead ends: 10167 [2022-03-15 16:43:34,840 INFO L226 Difference]: Without dead ends: 10094 [2022-03-15 16:43:34,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4754 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1844, Invalid=12198, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 16:43:34,841 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 644 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 3064 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 4031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:34,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 705 Invalid, 4031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3064 Invalid, 0 Unknown, 725 Unchecked, 1.6s Time] [2022-03-15 16:43:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10094 states. [2022-03-15 16:43:34,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10094 to 4922. [2022-03-15 16:43:34,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4922 states, 4921 states have (on average 3.4450314976630767) internal successors, (16953), 4921 states have internal predecessors, (16953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 16953 transitions. [2022-03-15 16:43:34,944 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 16953 transitions. Word has length 30 [2022-03-15 16:43:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:34,944 INFO L470 AbstractCegarLoop]: Abstraction has 4922 states and 16953 transitions. [2022-03-15 16:43:34,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2022-03-15 16:43:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 16953 transitions. [2022-03-15 16:43:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:34,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:34,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:34,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 16:43:35,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:35,151 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:35,152 INFO L85 PathProgramCache]: Analyzing trace with hash -64309065, now seen corresponding path program 37 times [2022-03-15 16:43:35,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:35,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911014664] [2022-03-15 16:43:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:35,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:35,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:35,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911014664] [2022-03-15 16:43:35,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911014664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:35,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460555796] [2022-03-15 16:43:35,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:43:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:35,583 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:35,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 16:43:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:35,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:43:35,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:35,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:35,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:35,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:35,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-03-15 16:43:35,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:35,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:35,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:35,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-03-15 16:43:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:36,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:36,305 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:43:36,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:43:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:36,323 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 26 treesize of output 55 [2022-03-15 16:43:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:36,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:43:36,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:36,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:43:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:36,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460555796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:36,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:36,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-15 16:43:36,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425018130] [2022-03-15 16:43:36,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:36,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:36,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:36,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:36,504 INFO L87 Difference]: Start difference. First operand 4922 states and 16953 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:43:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:49,811 INFO L93 Difference]: Finished difference Result 8870 states and 29263 transitions. [2022-03-15 16:43:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 16:43:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 30 [2022-03-15 16:43:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:49,827 INFO L225 Difference]: With dead ends: 8870 [2022-03-15 16:43:49,827 INFO L226 Difference]: Without dead ends: 8823 [2022-03-15 16:43:49,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8817 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3034, Invalid=20836, Unknown=0, NotChecked=0, Total=23870 [2022-03-15 16:43:49,828 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 661 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 3528 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 3528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:49,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 606 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 3528 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:43:49,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8823 states. [2022-03-15 16:43:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8823 to 4922. [2022-03-15 16:43:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4922 states, 4921 states have (on average 3.4450314976630767) internal successors, (16953), 4921 states have internal predecessors, (16953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4922 states to 4922 states and 16953 transitions. [2022-03-15 16:43:49,939 INFO L78 Accepts]: Start accepts. Automaton has 4922 states and 16953 transitions. Word has length 30 [2022-03-15 16:43:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:49,939 INFO L470 AbstractCegarLoop]: Abstraction has 4922 states and 16953 transitions. [2022-03-15 16:43:49,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:43:49,939 INFO L276 IsEmpty]: Start isEmpty. Operand 4922 states and 16953 transitions. [2022-03-15 16:43:49,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:49,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:49,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:49,962 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 16:43:50,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 16:43:50,147 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:50,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:50,148 INFO L85 PathProgramCache]: Analyzing trace with hash -523918848, now seen corresponding path program 21 times [2022-03-15 16:43:50,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:50,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038219754] [2022-03-15 16:43:50,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:50,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:50,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038219754] [2022-03-15 16:43:50,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038219754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:50,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960910463] [2022-03-15 16:43:50,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:43:50,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:50,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:50,514 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:50,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 16:43:50,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:43:50,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:50,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:43:50,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:50,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:50,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2022-03-15 16:43:50,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:50,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:50,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 23 treesize of output 11 [2022-03-15 16:43:50,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:50,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:51,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:51,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 92 [2022-03-15 16:43:51,318 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:51,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 76 [2022-03-15 16:43:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:52,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960910463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:52,316 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:52,316 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-15 16:43:52,316 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559719112] [2022-03-15 16:43:52,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:52,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:52,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:52,317 INFO L87 Difference]: Start difference. First operand 4922 states and 16953 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:43:56,113 INFO L93 Difference]: Finished difference Result 9342 states and 29595 transitions. [2022-03-15 16:43:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-15 16:43:56,113 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:43:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:43:56,130 INFO L225 Difference]: With dead ends: 9342 [2022-03-15 16:43:56,131 INFO L226 Difference]: Without dead ends: 9285 [2022-03-15 16:43:56,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1313, Invalid=7059, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 16:43:56,131 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 486 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 665 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:43:56,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 417 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1792 Invalid, 0 Unknown, 665 Unchecked, 0.9s Time] [2022-03-15 16:43:56,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9285 states. [2022-03-15 16:43:56,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9285 to 4967. [2022-03-15 16:43:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4967 states, 4966 states have (on average 3.4440193314538865) internal successors, (17103), 4966 states have internal predecessors, (17103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4967 states to 4967 states and 17103 transitions. [2022-03-15 16:43:56,227 INFO L78 Accepts]: Start accepts. Automaton has 4967 states and 17103 transitions. Word has length 30 [2022-03-15 16:43:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:43:56,227 INFO L470 AbstractCegarLoop]: Abstraction has 4967 states and 17103 transitions. [2022-03-15 16:43:56,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:43:56,227 INFO L276 IsEmpty]: Start isEmpty. Operand 4967 states and 17103 transitions. [2022-03-15 16:43:56,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:43:56,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:43:56,235 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:43:56,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 16:43:56,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-15 16:43:56,435 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:43:56,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:43:56,435 INFO L85 PathProgramCache]: Analyzing trace with hash -607240742, now seen corresponding path program 22 times [2022-03-15 16:43:56,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:43:56,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220021867] [2022-03-15 16:43:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:43:56,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:43:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:43:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:56,804 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:43:56,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220021867] [2022-03-15 16:43:56,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220021867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:43:56,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908476700] [2022-03-15 16:43:56,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:43:56,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:43:56,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:43:56,805 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:43:56,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 16:43:56,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:43:56,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:43:56,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:43:56,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:43:57,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:43:57,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-15 16:43:57,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,166 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 21 treesize of output 26 [2022-03-15 16:43:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:57,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:43:57,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:43:57,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:43:57,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,828 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 60 [2022-03-15 16:43:57,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:43:57,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:43:57,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:43:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:43:58,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908476700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:43:58,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:43:58,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 16:43:58,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120825349] [2022-03-15 16:43:58,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:43:58,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:43:58,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:43:58,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:43:58,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:43:58,090 INFO L87 Difference]: Start difference. First operand 4967 states and 17103 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:05,111 INFO L93 Difference]: Finished difference Result 10333 states and 32492 transitions. [2022-03-15 16:44:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-15 16:44:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:44:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:05,134 INFO L225 Difference]: With dead ends: 10333 [2022-03-15 16:44:05,134 INFO L226 Difference]: Without dead ends: 10238 [2022-03-15 16:44:05,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 37 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2237, Invalid=12769, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 16:44:05,135 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 681 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 3360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:05,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 565 Invalid, 3360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:44:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10238 states. [2022-03-15 16:44:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10238 to 5005. [2022-03-15 16:44:05,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5005 states, 5004 states have (on average 3.447841726618705) internal successors, (17253), 5004 states have internal predecessors, (17253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:05,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5005 states to 5005 states and 17253 transitions. [2022-03-15 16:44:05,241 INFO L78 Accepts]: Start accepts. Automaton has 5005 states and 17253 transitions. Word has length 30 [2022-03-15 16:44:05,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:05,241 INFO L470 AbstractCegarLoop]: Abstraction has 5005 states and 17253 transitions. [2022-03-15 16:44:05,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:05,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5005 states and 17253 transitions. [2022-03-15 16:44:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:05,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:05,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:05,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 16:44:05,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-15 16:44:05,449 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:05,449 INFO L85 PathProgramCache]: Analyzing trace with hash -246142976, now seen corresponding path program 23 times [2022-03-15 16:44:05,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:05,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310435735] [2022-03-15 16:44:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:05,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:05,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310435735] [2022-03-15 16:44:05,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310435735] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:05,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704876059] [2022-03-15 16:44:05,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:05,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:05,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:05,925 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:05,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 16:44:05,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:05,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:05,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:44:05,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:06,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:06,241 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-03-15 16:44:06,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:06,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:06,249 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 26 [2022-03-15 16:44:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:06,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:06,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:06,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:44:06,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:06,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:44:06,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:06,939 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 60 [2022-03-15 16:44:06,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:06,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:06,963 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 23 treesize of output 50 [2022-03-15 16:44:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:07,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704876059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:07,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:07,250 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:44:07,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745086211] [2022-03-15 16:44:07,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:07,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:07,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:07,250 INFO L87 Difference]: Start difference. First operand 5005 states and 17253 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:12,916 INFO L93 Difference]: Finished difference Result 9678 states and 30736 transitions. [2022-03-15 16:44:12,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 16:44:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:44:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:12,932 INFO L225 Difference]: With dead ends: 9678 [2022-03-15 16:44:12,932 INFO L226 Difference]: Without dead ends: 9528 [2022-03-15 16:44:12,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3505 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1743, Invalid=8763, Unknown=0, NotChecked=0, Total=10506 [2022-03-15 16:44:12,933 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 614 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:12,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 476 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:44:12,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9528 states. [2022-03-15 16:44:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9528 to 5028. [2022-03-15 16:44:13,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5028 states, 5027 states have (on average 3.448975532126517) internal successors, (17338), 5027 states have internal predecessors, (17338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5028 states to 5028 states and 17338 transitions. [2022-03-15 16:44:13,029 INFO L78 Accepts]: Start accepts. Automaton has 5028 states and 17338 transitions. Word has length 30 [2022-03-15 16:44:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:13,029 INFO L470 AbstractCegarLoop]: Abstraction has 5028 states and 17338 transitions. [2022-03-15 16:44:13,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 5028 states and 17338 transitions. [2022-03-15 16:44:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:13,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:13,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:13,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:13,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:13,237 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:13,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1083842874, now seen corresponding path program 24 times [2022-03-15 16:44:13,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:13,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692174769] [2022-03-15 16:44:13,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:13,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:13,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:13,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:13,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692174769] [2022-03-15 16:44:13,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692174769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:13,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350035364] [2022-03-15 16:44:13,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:13,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:13,642 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:13,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 16:44:13,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:13,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:13,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:44:13,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:14,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:14,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 48 [2022-03-15 16:44:14,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:14,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 52 [2022-03-15 16:44:14,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:14,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:14,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:14,582 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 34 treesize of output 61 [2022-03-15 16:44:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:14,600 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 24 treesize of output 51 [2022-03-15 16:44:14,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-15 16:44:14,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:14,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-15 16:44:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:14,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350035364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:14,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:14,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 16:44:14,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119753832] [2022-03-15 16:44:14,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:44:14,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:44:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:44:14,912 INFO L87 Difference]: Start difference. First operand 5028 states and 17338 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:19,768 INFO L93 Difference]: Finished difference Result 9618 states and 31388 transitions. [2022-03-15 16:44:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-15 16:44:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:44:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:19,785 INFO L225 Difference]: With dead ends: 9618 [2022-03-15 16:44:19,786 INFO L226 Difference]: Without dead ends: 9582 [2022-03-15 16:44:19,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1184, Invalid=7558, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 16:44:19,787 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 665 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 3411 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 3411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:19,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 544 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 3411 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:44:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9582 states. [2022-03-15 16:44:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9582 to 5059. [2022-03-15 16:44:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5059 states, 5058 states have (on average 3.4499802293396598) internal successors, (17450), 5058 states have internal predecessors, (17450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:19,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5059 states to 5059 states and 17450 transitions. [2022-03-15 16:44:19,890 INFO L78 Accepts]: Start accepts. Automaton has 5059 states and 17450 transitions. Word has length 30 [2022-03-15 16:44:19,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:19,890 INFO L470 AbstractCegarLoop]: Abstraction has 5059 states and 17450 transitions. [2022-03-15 16:44:19,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 5059 states and 17450 transitions. [2022-03-15 16:44:19,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:19,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:19,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:19,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 16:44:20,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:20,098 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:20,098 INFO L85 PathProgramCache]: Analyzing trace with hash -86404540, now seen corresponding path program 25 times [2022-03-15 16:44:20,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:20,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960008094] [2022-03-15 16:44:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:20,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:20,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:20,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960008094] [2022-03-15 16:44:20,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960008094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:20,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504941630] [2022-03-15 16:44:20,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:44:20,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:20,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:20,458 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:20,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 16:44:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:20,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:44:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:20,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:20,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:20,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 16:44:20,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:20,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-15 16:44:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:20,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:21,233 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:44:21,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:44:21,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:21,257 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:21,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:44:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:21,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:21,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:21,553 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 60 [2022-03-15 16:44:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:21,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:21,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:21,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:44:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:21,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504941630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:21,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:21,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-03-15 16:44:21,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355401156] [2022-03-15 16:44:21,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:21,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:21,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:21,813 INFO L87 Difference]: Start difference. First operand 5059 states and 17450 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:25,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:25,386 INFO L93 Difference]: Finished difference Result 8969 states and 29168 transitions. [2022-03-15 16:44:25,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:44:25,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 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 30 [2022-03-15 16:44:25,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:25,403 INFO L225 Difference]: With dead ends: 8969 [2022-03-15 16:44:25,403 INFO L226 Difference]: Without dead ends: 8935 [2022-03-15 16:44:25,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=633, Invalid=5067, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 16:44:25,404 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 326 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:25,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 468 Invalid, 2935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 2814 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:44:25,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2022-03-15 16:44:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 5120. [2022-03-15 16:44:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5120 states, 5119 states have (on average 3.4506739597577654) internal successors, (17664), 5119 states have internal predecessors, (17664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 17664 transitions. [2022-03-15 16:44:25,506 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 17664 transitions. Word has length 30 [2022-03-15 16:44:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:25,506 INFO L470 AbstractCegarLoop]: Abstraction has 5120 states and 17664 transitions. [2022-03-15 16:44:25,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 17664 transitions. [2022-03-15 16:44:25,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:25,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:25,513 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:25,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-15 16:44:25,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 16:44:25,714 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:25,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1314010376, now seen corresponding path program 26 times [2022-03-15 16:44:25,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:25,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509908017] [2022-03-15 16:44:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:25,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:26,125 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:26,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:26,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509908017] [2022-03-15 16:44:26,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509908017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:26,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021344390] [2022-03-15 16:44:26,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:44:26,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:26,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:26,127 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:26,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 16:44:26,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:44:26,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:26,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:44:26,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:26,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 23 [2022-03-15 16:44:26,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:26,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:44:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:26,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:26,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:26,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:26,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:44:26,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:26,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:26,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:44:27,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:27,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 60 [2022-03-15 16:44:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:27,205 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:27,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:44:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:27,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021344390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:27,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:27,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 16:44:27,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699765687] [2022-03-15 16:44:27,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:27,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:27,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:27,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:27,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:27,490 INFO L87 Difference]: Start difference. First operand 5120 states and 17664 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:30,498 INFO L93 Difference]: Finished difference Result 8343 states and 26950 transitions. [2022-03-15 16:44:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:44:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 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 30 [2022-03-15 16:44:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:30,514 INFO L225 Difference]: With dead ends: 8343 [2022-03-15 16:44:30,514 INFO L226 Difference]: Without dead ends: 8313 [2022-03-15 16:44:30,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=956, Invalid=5364, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 16:44:30,515 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 400 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1761 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 2116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:30,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 303 Invalid, 2116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1761 Invalid, 0 Unknown, 184 Unchecked, 0.9s Time] [2022-03-15 16:44:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8313 states. [2022-03-15 16:44:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8313 to 5156. [2022-03-15 16:44:30,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5156 states, 5155 states have (on average 3.45082444228904) internal successors, (17789), 5155 states have internal predecessors, (17789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5156 states to 5156 states and 17789 transitions. [2022-03-15 16:44:30,610 INFO L78 Accepts]: Start accepts. Automaton has 5156 states and 17789 transitions. Word has length 30 [2022-03-15 16:44:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:30,610 INFO L470 AbstractCegarLoop]: Abstraction has 5156 states and 17789 transitions. [2022-03-15 16:44:30,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 31 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5156 states and 17789 transitions. [2022-03-15 16:44:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:30,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:30,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:30,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-15 16:44:30,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-15 16:44:30,817 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2110958692, now seen corresponding path program 27 times [2022-03-15 16:44:30,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:30,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509955302] [2022-03-15 16:44:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:30,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:31,165 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:31,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509955302] [2022-03-15 16:44:31,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509955302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:31,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791582203] [2022-03-15 16:44:31,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:44:31,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:31,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:31,166 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:31,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 16:44:31,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:44:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 16:44:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:31,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:31,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 treesize of output 53 [2022-03-15 16:44:31,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:31,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 57 treesize of output 61 [2022-03-15 16:44:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:31,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:32,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:32,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-15 16:44:32,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,169 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:32,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-15 16:44:32,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-15 16:44:32,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:32,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-15 16:44:32,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:32,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791582203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:32,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:32,444 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 16:44:32,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791478711] [2022-03-15 16:44:32,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:32,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:44:32,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:32,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:44:32,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:44:32,445 INFO L87 Difference]: Start difference. First operand 5156 states and 17789 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:37,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:37,919 INFO L93 Difference]: Finished difference Result 9452 states and 30912 transitions. [2022-03-15 16:44:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 16:44:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:44:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:37,936 INFO L225 Difference]: With dead ends: 9452 [2022-03-15 16:44:37,936 INFO L226 Difference]: Without dead ends: 9437 [2022-03-15 16:44:37,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2624 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1233, Invalid=8079, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 16:44:37,936 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 835 mSDsluCounter, 1055 mSDsCounter, 0 mSdLazyCounter, 2877 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 3141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:37,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 453 Invalid, 3141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2877 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:44:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9437 states. [2022-03-15 16:44:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9437 to 5134. [2022-03-15 16:44:38,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5134 states, 5133 states have (on average 3.450613676212741) internal successors, (17712), 5133 states have internal predecessors, (17712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5134 states to 5134 states and 17712 transitions. [2022-03-15 16:44:38,036 INFO L78 Accepts]: Start accepts. Automaton has 5134 states and 17712 transitions. Word has length 30 [2022-03-15 16:44:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:38,036 INFO L470 AbstractCegarLoop]: Abstraction has 5134 states and 17712 transitions. [2022-03-15 16:44:38,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5134 states and 17712 transitions. [2022-03-15 16:44:38,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:38,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:38,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:38,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-15 16:44:38,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:38,248 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:38,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:38,249 INFO L85 PathProgramCache]: Analyzing trace with hash 2100686710, now seen corresponding path program 28 times [2022-03-15 16:44:38,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:38,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502067548] [2022-03-15 16:44:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:38,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:38,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:38,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502067548] [2022-03-15 16:44:38,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502067548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:38,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62702122] [2022-03-15 16:44:38,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:44:38,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:38,660 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:38,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 16:44:38,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:44:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:38,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:44:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:39,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:39,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,013 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-15 16:44:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:39,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-15 16:44:39,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:39,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:39,440 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:44:39,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:44:39,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,463 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:44:39,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,798 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:44:39,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:39,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:39,816 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 23 treesize of output 50 [2022-03-15 16:44:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:40,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62702122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:40,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:40,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:44:40,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82678434] [2022-03-15 16:44:40,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:40,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:44:40,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:40,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:44:40,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:44:40,028 INFO L87 Difference]: Start difference. First operand 5134 states and 17712 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:47,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:47,210 INFO L93 Difference]: Finished difference Result 11132 states and 35856 transitions. [2022-03-15 16:44:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 16:44:47,211 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:44:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:47,231 INFO L225 Difference]: With dead ends: 11132 [2022-03-15 16:44:47,231 INFO L226 Difference]: Without dead ends: 11029 [2022-03-15 16:44:47,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5359 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1864, Invalid=13388, Unknown=0, NotChecked=0, Total=15252 [2022-03-15 16:44:47,232 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 577 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 3768 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 4764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 3768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:47,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [577 Valid, 901 Invalid, 4764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 3768 Invalid, 0 Unknown, 752 Unchecked, 1.9s Time] [2022-03-15 16:44:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11029 states. [2022-03-15 16:44:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11029 to 5128. [2022-03-15 16:44:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 3.4488004681100057) internal successors, (17682), 5127 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 17682 transitions. [2022-03-15 16:44:47,351 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 17682 transitions. Word has length 30 [2022-03-15 16:44:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:47,351 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 17682 transitions. [2022-03-15 16:44:47,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 17682 transitions. [2022-03-15 16:44:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:47,357 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:47,357 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:47,373 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 16:44:47,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 16:44:47,558 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:47,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:47,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1568664778, now seen corresponding path program 29 times [2022-03-15 16:44:47,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:47,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133887579] [2022-03-15 16:44:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:47,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:47,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:47,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133887579] [2022-03-15 16:44:47,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133887579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:47,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978186194] [2022-03-15 16:44:47,926 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:44:47,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:47,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:47,927 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:47,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 16:44:47,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:44:47,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:44:47,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:48,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:48,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:48,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:44:48,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:48,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:44:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:48,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:48,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:48,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:48,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:44:48,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:48,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:48,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:44:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:49,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:44:49,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:49,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:49,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:44:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:49,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978186194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:49,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:49,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 33 [2022-03-15 16:44:49,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64644483] [2022-03-15 16:44:49,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:49,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:44:49,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:49,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:44:49,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:44:49,285 INFO L87 Difference]: Start difference. First operand 5128 states and 17682 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:44:55,674 INFO L93 Difference]: Finished difference Result 9405 states and 30134 transitions. [2022-03-15 16:44:55,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-15 16:44:55,674 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-15 16:44:55,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:44:55,691 INFO L225 Difference]: With dead ends: 9405 [2022-03-15 16:44:55,691 INFO L226 Difference]: Without dead ends: 9375 [2022-03-15 16:44:55,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2071, Invalid=15485, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:44:55,692 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 461 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 3167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:44:55,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 582 Invalid, 3167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 2581 Invalid, 0 Unknown, 370 Unchecked, 1.4s Time] [2022-03-15 16:44:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9375 states. [2022-03-15 16:44:55,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9375 to 5146. [2022-03-15 16:44:55,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5146 states, 5145 states have (on average 3.4487852283770652) internal successors, (17744), 5145 states have internal predecessors, (17744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:55,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5146 states to 5146 states and 17744 transitions. [2022-03-15 16:44:55,797 INFO L78 Accepts]: Start accepts. Automaton has 5146 states and 17744 transitions. Word has length 30 [2022-03-15 16:44:55,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:44:55,798 INFO L470 AbstractCegarLoop]: Abstraction has 5146 states and 17744 transitions. [2022-03-15 16:44:55,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:44:55,798 INFO L276 IsEmpty]: Start isEmpty. Operand 5146 states and 17744 transitions. [2022-03-15 16:44:55,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:44:55,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:44:55,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:44:55,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 16:44:56,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 16:44:56,005 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:44:56,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:44:56,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1175143098, now seen corresponding path program 30 times [2022-03-15 16:44:56,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:44:56,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193660673] [2022-03-15 16:44:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:44:56,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:44:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:44:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:56,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:44:56,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193660673] [2022-03-15 16:44:56,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193660673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:44:56,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222836345] [2022-03-15 16:44:56,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:44:56,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:44:56,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:44:56,343 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:44:56,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 16:44:56,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:44:56,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:44:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:44:56,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:44:56,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:44:56,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:56,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 16:44:56,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-15 16:44:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:56,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:44:57,060 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:44:57,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:44:57,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:57,082 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:57,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:44:57,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:57,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:57,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:57,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:44:57,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:57,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:44:57,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:44:57,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:44:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:44:57,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222836345] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:44:57,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:44:57,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 16:44:57,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434466194] [2022-03-15 16:44:57,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:44:57,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:44:57,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:44:57,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:44:57,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:44:57,581 INFO L87 Difference]: Start difference. First operand 5146 states and 17744 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2022-03-15 16:45:01,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:01,896 INFO L93 Difference]: Finished difference Result 9366 states and 30559 transitions. [2022-03-15 16:45:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 16:45:01,896 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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 30 [2022-03-15 16:45:01,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:01,913 INFO L225 Difference]: With dead ends: 9366 [2022-03-15 16:45:01,914 INFO L226 Difference]: Without dead ends: 9307 [2022-03-15 16:45:01,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2287 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=995, Invalid=6661, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 16:45:01,914 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 422 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 602 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:01,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 572 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 2348 Invalid, 0 Unknown, 602 Unchecked, 1.2s Time] [2022-03-15 16:45:01,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2022-03-15 16:45:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 5128. [2022-03-15 16:45:02,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5128 states, 5127 states have (on average 3.4488004681100057) internal successors, (17682), 5127 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5128 states to 5128 states and 17682 transitions. [2022-03-15 16:45:02,020 INFO L78 Accepts]: Start accepts. Automaton has 5128 states and 17682 transitions. Word has length 30 [2022-03-15 16:45:02,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:02,020 INFO L470 AbstractCegarLoop]: Abstraction has 5128 states and 17682 transitions. [2022-03-15 16:45:02,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2022-03-15 16:45:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 5128 states and 17682 transitions. [2022-03-15 16:45:02,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:02,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:02,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:02,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 16:45:02,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 16:45:02,227 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:02,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:02,228 INFO L85 PathProgramCache]: Analyzing trace with hash -992757202, now seen corresponding path program 31 times [2022-03-15 16:45:02,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:02,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250006613] [2022-03-15 16:45:02,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:02,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:02,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:02,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250006613] [2022-03-15 16:45:02,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250006613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:02,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210419149] [2022-03-15 16:45:02,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:02,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:02,632 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:02,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 16:45:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:45:02,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:03,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:03,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:03,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 16:45:03,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-15 16:45:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:03,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:03,485 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:45:03,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:45:03,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:03,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:45:03,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:03,818 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 60 [2022-03-15 16:45:03,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:03,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:03,854 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 23 treesize of output 50 [2022-03-15 16:45:04,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:04,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210419149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:04,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:04,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 16:45:04,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048496322] [2022-03-15 16:45:04,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:04,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:04,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:04,087 INFO L87 Difference]: Start difference. First operand 5128 states and 17682 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:08,082 INFO L93 Difference]: Finished difference Result 9730 states and 31641 transitions. [2022-03-15 16:45:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 16:45:08,083 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:08,100 INFO L225 Difference]: With dead ends: 9730 [2022-03-15 16:45:08,101 INFO L226 Difference]: Without dead ends: 9641 [2022-03-15 16:45:08,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=971, Invalid=6511, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 16:45:08,102 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 404 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 3572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 759 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:08,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 667 Invalid, 3572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 2636 Invalid, 0 Unknown, 759 Unchecked, 1.3s Time] [2022-03-15 16:45:08,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2022-03-15 16:45:08,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 5129. [2022-03-15 16:45:08,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5129 states, 5128 states have (on average 3.4481279251170047) internal successors, (17682), 5128 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:08,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5129 states to 5129 states and 17682 transitions. [2022-03-15 16:45:08,231 INFO L78 Accepts]: Start accepts. Automaton has 5129 states and 17682 transitions. Word has length 30 [2022-03-15 16:45:08,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:08,231 INFO L470 AbstractCegarLoop]: Abstraction has 5129 states and 17682 transitions. [2022-03-15 16:45:08,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:08,231 INFO L276 IsEmpty]: Start isEmpty. Operand 5129 states and 17682 transitions. [2022-03-15 16:45:08,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:08,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:08,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:08,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 16:45:08,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-15 16:45:08,438 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:08,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:08,439 INFO L85 PathProgramCache]: Analyzing trace with hash 882054174, now seen corresponding path program 32 times [2022-03-15 16:45:08,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:08,439 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115368481] [2022-03-15 16:45:08,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:08,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:08,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:08,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115368481] [2022-03-15 16:45:08,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115368481] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:08,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866825731] [2022-03-15 16:45:08,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:08,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:08,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:08,826 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:08,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 16:45:08,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:08,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:08,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:45:08,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:09,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:09,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:09,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 41 [2022-03-15 16:45:09,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-15 16:45:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:09,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:09,546 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:45:09,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:45:09,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:09,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:45:09,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:09,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:45:09,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:09,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:09,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:45:10,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:10,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866825731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:10,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:10,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:45:10,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942809007] [2022-03-15 16:45:10,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:10,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:45:10,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:10,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:45:10,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:45:10,126 INFO L87 Difference]: Start difference. First operand 5129 states and 17682 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:13,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:13,533 INFO L93 Difference]: Finished difference Result 9265 states and 30079 transitions. [2022-03-15 16:45:13,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 16:45:13,533 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:13,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:13,552 INFO L225 Difference]: With dead ends: 9265 [2022-03-15 16:45:13,552 INFO L226 Difference]: Without dead ends: 9231 [2022-03-15 16:45:13,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1949 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=884, Invalid=6088, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:45:13,553 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 431 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 2311 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:13,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 512 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2311 Invalid, 0 Unknown, 448 Unchecked, 1.2s Time] [2022-03-15 16:45:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9231 states. [2022-03-15 16:45:13,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9231 to 5125. [2022-03-15 16:45:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5125 states, 5124 states have (on average 3.4484777517564402) internal successors, (17670), 5124 states have internal predecessors, (17670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:13,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5125 states to 5125 states and 17670 transitions. [2022-03-15 16:45:13,677 INFO L78 Accepts]: Start accepts. Automaton has 5125 states and 17670 transitions. Word has length 30 [2022-03-15 16:45:13,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:13,677 INFO L470 AbstractCegarLoop]: Abstraction has 5125 states and 17670 transitions. [2022-03-15 16:45:13,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:13,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5125 states and 17670 transitions. [2022-03-15 16:45:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:13,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:13,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:13,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 16:45:13,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:13,884 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:13,885 INFO L85 PathProgramCache]: Analyzing trace with hash -169923416, now seen corresponding path program 33 times [2022-03-15 16:45:13,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:13,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777729196] [2022-03-15 16:45:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:13,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:14,233 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:14,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:14,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777729196] [2022-03-15 16:45:14,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777729196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:14,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196479622] [2022-03-15 16:45:14,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:45:14,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:14,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:14,235 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:14,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 16:45:14,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:45:14,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:14,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:45:14,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:14,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:14,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2022-03-15 16:45:14,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:14,609 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 79 treesize of output 87 [2022-03-15 16:45:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:15,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:15,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:15,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 93 [2022-03-15 16:45:15,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:15,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2022-03-15 16:45:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:17,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196479622] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:17,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:17,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 33 [2022-03-15 16:45:17,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920053259] [2022-03-15 16:45:17,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:17,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:45:17,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:17,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:45:17,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=913, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:45:17,028 INFO L87 Difference]: Start difference. First operand 5125 states and 17670 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2022-03-15 16:45:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:19,788 INFO L93 Difference]: Finished difference Result 8763 states and 29254 transitions. [2022-03-15 16:45:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 16:45:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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 30 [2022-03-15 16:45:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:19,805 INFO L225 Difference]: With dead ends: 8763 [2022-03-15 16:45:19,805 INFO L226 Difference]: Without dead ends: 8727 [2022-03-15 16:45:19,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=855, Invalid=4997, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 16:45:19,806 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 437 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 941 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:19,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 345 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1389 Invalid, 0 Unknown, 941 Unchecked, 0.8s Time] [2022-03-15 16:45:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8727 states. [2022-03-15 16:45:19,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8727 to 5167. [2022-03-15 16:45:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5167 states, 5166 states have (on average 3.446380178087495) internal successors, (17804), 5166 states have internal predecessors, (17804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:19,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5167 states to 5167 states and 17804 transitions. [2022-03-15 16:45:19,903 INFO L78 Accepts]: Start accepts. Automaton has 5167 states and 17804 transitions. Word has length 30 [2022-03-15 16:45:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:19,904 INFO L470 AbstractCegarLoop]: Abstraction has 5167 states and 17804 transitions. [2022-03-15 16:45:19,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2022-03-15 16:45:19,904 INFO L276 IsEmpty]: Start isEmpty. Operand 5167 states and 17804 transitions. [2022-03-15 16:45:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:19,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:19,910 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:19,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-15 16:45:20,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:20,113 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:20,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1970047154, now seen corresponding path program 34 times [2022-03-15 16:45:20,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:20,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953656937] [2022-03-15 16:45:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:20,545 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:20,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:20,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953656937] [2022-03-15 16:45:20,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953656937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:20,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693033338] [2022-03-15 16:45:20,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:45:20,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:20,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:20,548 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:20,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 16:45:20,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:45:20,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:45:20,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:20,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:20,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:20,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 treesize of output 23 [2022-03-15 16:45:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:20,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:45:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:21,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:21,334 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:45:21,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:45:21,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:21,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:21,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:45:21,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:21,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:21,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:21,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:45:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:21,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:21,692 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:21,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:45:21,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:21,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693033338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:21,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:21,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:45:21,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191910144] [2022-03-15 16:45:21,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:21,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:45:21,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:45:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:45:21,908 INFO L87 Difference]: Start difference. First operand 5167 states and 17804 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:27,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:27,513 INFO L93 Difference]: Finished difference Result 10064 states and 32690 transitions. [2022-03-15 16:45:27,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 16:45:27,514 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:27,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:27,532 INFO L225 Difference]: With dead ends: 10064 [2022-03-15 16:45:27,532 INFO L226 Difference]: Without dead ends: 10030 [2022-03-15 16:45:27,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1381, Invalid=10391, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 16:45:27,533 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 462 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 3370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:27,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 457 Invalid, 3370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 2884 Invalid, 0 Unknown, 273 Unchecked, 1.6s Time] [2022-03-15 16:45:27,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2022-03-15 16:45:27,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 5264. [2022-03-15 16:45:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5264 states, 5263 states have (on average 3.444423332699981) internal successors, (18128), 5263 states have internal predecessors, (18128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5264 states to 5264 states and 18128 transitions. [2022-03-15 16:45:27,639 INFO L78 Accepts]: Start accepts. Automaton has 5264 states and 18128 transitions. Word has length 30 [2022-03-15 16:45:27,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:27,639 INFO L470 AbstractCegarLoop]: Abstraction has 5264 states and 18128 transitions. [2022-03-15 16:45:27,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 5264 states and 18128 transitions. [2022-03-15 16:45:27,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:27,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:27,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:27,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:27,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:27,847 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:27,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1265219960, now seen corresponding path program 35 times [2022-03-15 16:45:27,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:27,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43719949] [2022-03-15 16:45:27,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:27,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:28,211 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:28,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43719949] [2022-03-15 16:45:28,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43719949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:28,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616168927] [2022-03-15 16:45:28,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:45:28,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:28,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:28,212 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 16:45:28,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:45:28,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:28,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:45:28,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:28,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:28,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:28,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-03-15 16:45:28,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:28,555 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 21 treesize of output 26 [2022-03-15 16:45:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:28,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:28,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:28,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:28,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:45:28,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:29,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:29,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:45:29,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:29,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:29,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:29,299 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 60 [2022-03-15 16:45:29,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:29,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:29,317 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:29,317 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 23 treesize of output 50 [2022-03-15 16:45:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:29,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616168927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:29,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:29,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 16:45:29,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475524265] [2022-03-15 16:45:29,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:29,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:45:29,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:29,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:45:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:45:29,532 INFO L87 Difference]: Start difference. First operand 5264 states and 18128 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:40,035 INFO L93 Difference]: Finished difference Result 11819 states and 36632 transitions. [2022-03-15 16:45:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-15 16:45:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:40,055 INFO L225 Difference]: With dead ends: 11819 [2022-03-15 16:45:40,055 INFO L226 Difference]: Without dead ends: 11645 [2022-03-15 16:45:40,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11439 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3688, Invalid=28174, Unknown=0, NotChecked=0, Total=31862 [2022-03-15 16:45:40,057 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 723 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 3997 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 4253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:40,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 869 Invalid, 4253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3997 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-15 16:45:40,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11645 states. [2022-03-15 16:45:40,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11645 to 5298. [2022-03-15 16:45:40,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5298 states, 5297 states have (on average 3.4470454974513878) internal successors, (18259), 5297 states have internal predecessors, (18259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5298 states to 5298 states and 18259 transitions. [2022-03-15 16:45:40,185 INFO L78 Accepts]: Start accepts. Automaton has 5298 states and 18259 transitions. Word has length 30 [2022-03-15 16:45:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:40,185 INFO L470 AbstractCegarLoop]: Abstraction has 5298 states and 18259 transitions. [2022-03-15 16:45:40,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:40,186 INFO L276 IsEmpty]: Start isEmpty. Operand 5298 states and 18259 transitions. [2022-03-15 16:45:40,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:40,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:40,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:40,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 16:45:40,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-15 16:45:40,393 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:40,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:40,393 INFO L85 PathProgramCache]: Analyzing trace with hash 596373144, now seen corresponding path program 36 times [2022-03-15 16:45:40,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:40,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451421834] [2022-03-15 16:45:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:40,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:40,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451421834] [2022-03-15 16:45:40,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451421834] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:40,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530936606] [2022-03-15 16:45:40,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:45:40,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:40,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:40,860 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:40,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 16:45:40,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:45:40,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:40,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:45:40,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:41,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:41,235 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:41,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 49 [2022-03-15 16:45:41,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:41,240 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 21 treesize of output 26 [2022-03-15 16:45:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:41,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:41,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:41,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:41,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:45:41,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:41,633 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:41,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:45:41,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:41,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:41,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:41,914 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 60 [2022-03-15 16:45:41,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:41,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:41,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:41,939 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 23 treesize of output 50 [2022-03-15 16:45:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:42,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530936606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:42,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:42,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 31 [2022-03-15 16:45:42,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966401309] [2022-03-15 16:45:42,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:42,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:45:42,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:45:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:45:42,187 INFO L87 Difference]: Start difference. First operand 5298 states and 18259 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:47,415 INFO L93 Difference]: Finished difference Result 10021 states and 32027 transitions. [2022-03-15 16:45:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 16:45:47,415 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:47,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:47,432 INFO L225 Difference]: With dead ends: 10021 [2022-03-15 16:45:47,432 INFO L226 Difference]: Without dead ends: 9865 [2022-03-15 16:45:47,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3692 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1731, Invalid=9399, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 16:45:47,433 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 553 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 2408 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 2408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:47,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 371 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 2408 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 16:45:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9865 states. [2022-03-15 16:45:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9865 to 5364. [2022-03-15 16:45:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5364 states, 5363 states have (on average 3.442103300391572) internal successors, (18460), 5363 states have internal predecessors, (18460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5364 states to 5364 states and 18460 transitions. [2022-03-15 16:45:47,536 INFO L78 Accepts]: Start accepts. Automaton has 5364 states and 18460 transitions. Word has length 30 [2022-03-15 16:45:47,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:47,536 INFO L470 AbstractCegarLoop]: Abstraction has 5364 states and 18460 transitions. [2022-03-15 16:45:47,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 5364 states and 18460 transitions. [2022-03-15 16:45:47,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:47,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:47,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:47,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 16:45:47,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:47,744 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:47,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1274241086, now seen corresponding path program 37 times [2022-03-15 16:45:47,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:47,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013196341] [2022-03-15 16:45:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:48,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:48,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013196341] [2022-03-15 16:45:48,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013196341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:48,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653482112] [2022-03-15 16:45:48,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:45:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:48,095 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:48,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 16:45:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:48,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:45:48,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:48,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:48,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 16:45:48,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:48,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:45:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:48,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:48,782 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:45:48,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:45:48,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:48,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:48,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:45:49,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:45:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:49,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:49,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:45:49,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:49,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653482112] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:49,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:49,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:45:49,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689545824] [2022-03-15 16:45:49,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:49,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:45:49,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:49,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:45:49,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:45:49,375 INFO L87 Difference]: Start difference. First operand 5364 states and 18460 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:56,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:45:56,531 INFO L93 Difference]: Finished difference Result 10403 states and 33580 transitions. [2022-03-15 16:45:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-15 16:45:56,531 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:45:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:45:56,550 INFO L225 Difference]: With dead ends: 10403 [2022-03-15 16:45:56,550 INFO L226 Difference]: Without dead ends: 10349 [2022-03-15 16:45:56,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6035 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2112, Invalid=15180, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 16:45:56,551 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 551 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 3540 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 3540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:45:56,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 528 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 3540 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:45:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10349 states. [2022-03-15 16:45:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10349 to 5441. [2022-03-15 16:45:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.4382352941176473) internal successors, (18704), 5440 states have internal predecessors, (18704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 18704 transitions. [2022-03-15 16:45:56,658 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 18704 transitions. Word has length 30 [2022-03-15 16:45:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:45:56,658 INFO L470 AbstractCegarLoop]: Abstraction has 5441 states and 18704 transitions. [2022-03-15 16:45:56,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:45:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 18704 transitions. [2022-03-15 16:45:56,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:45:56,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:45:56,665 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:45:56,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 16:45:56,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:56,866 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:45:56,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:45:56,866 INFO L85 PathProgramCache]: Analyzing trace with hash 399924082, now seen corresponding path program 38 times [2022-03-15 16:45:56,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:45:56,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68372429] [2022-03-15 16:45:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:45:56,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:45:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:45:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:57,238 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:45:57,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68372429] [2022-03-15 16:45:57,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68372429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:45:57,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263349287] [2022-03-15 16:45:57,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:45:57,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:45:57,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:45:57,240 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:45:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 16:45:57,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:45:57,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:45:57,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:45:57,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:45:57,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:45:57,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:57,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 37 [2022-03-15 16:45:57,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:57,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 16:45:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:57,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:45:57,957 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:45:57,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:45:57,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:57,978 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:57,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:45:58,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:58,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:58,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:58,265 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 34 treesize of output 61 [2022-03-15 16:45:58,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:58,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:45:58,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:45:58,288 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 24 treesize of output 51 [2022-03-15 16:45:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:45:58,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263349287] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:45:58,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:45:58,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-15 16:45:58,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421808616] [2022-03-15 16:45:58,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:45:58,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:45:58,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:45:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:45:58,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:45:58,523 INFO L87 Difference]: Start difference. First operand 5441 states and 18704 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:03,709 INFO L93 Difference]: Finished difference Result 9661 states and 31427 transitions. [2022-03-15 16:46:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 16:46:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-15 16:46:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:03,727 INFO L225 Difference]: With dead ends: 9661 [2022-03-15 16:46:03,728 INFO L226 Difference]: Without dead ends: 9592 [2022-03-15 16:46:03,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3813 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1380, Invalid=9962, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 16:46:03,729 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 554 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 2341 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 2341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:03,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 392 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 2341 Invalid, 0 Unknown, 105 Unchecked, 1.2s Time] [2022-03-15 16:46:03,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9592 states. [2022-03-15 16:46:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9592 to 5480. [2022-03-15 16:46:03,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5480 states, 5479 states have (on average 3.436210987406461) internal successors, (18827), 5479 states have internal predecessors, (18827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5480 states to 5480 states and 18827 transitions. [2022-03-15 16:46:03,864 INFO L78 Accepts]: Start accepts. Automaton has 5480 states and 18827 transitions. Word has length 30 [2022-03-15 16:46:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:03,864 INFO L470 AbstractCegarLoop]: Abstraction has 5480 states and 18827 transitions. [2022-03-15 16:46:03,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 5480 states and 18827 transitions. [2022-03-15 16:46:03,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:03,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:03,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:03,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 16:46:04,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 16:46:04,073 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:04,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2104067314, now seen corresponding path program 39 times [2022-03-15 16:46:04,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:04,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178550098] [2022-03-15 16:46:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:04,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:04,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:04,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:04,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178550098] [2022-03-15 16:46:04,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178550098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:04,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387731778] [2022-03-15 16:46:04,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:04,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:04,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:04,460 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 16:46:04,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:46:04,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:46:04,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:04,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:04,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:04,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-15 16:46:04,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:04,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-15 16:46:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:04,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:05,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:05,292 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:05,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:46:05,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:05,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:05,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:46:05,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:05,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:05,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:05,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:46:05,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:05,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:05,655 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 23 treesize of output 50 [2022-03-15 16:46:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:05,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387731778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:05,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:05,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 16:46:05,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727618183] [2022-03-15 16:46:05,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:05,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:46:05,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:05,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:46:05,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:46:05,940 INFO L87 Difference]: Start difference. First operand 5480 states and 18827 transitions. Second operand has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:08,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:08,445 INFO L93 Difference]: Finished difference Result 8850 states and 28600 transitions. [2022-03-15 16:46:08,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 16:46:08,446 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 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 30 [2022-03-15 16:46:08,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:08,465 INFO L225 Difference]: With dead ends: 8850 [2022-03-15 16:46:08,465 INFO L226 Difference]: Without dead ends: 8820 [2022-03-15 16:46:08,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1895 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=959, Invalid=4591, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 16:46:08,466 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 465 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 688 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:08,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 278 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1164 Invalid, 0 Unknown, 688 Unchecked, 0.7s Time] [2022-03-15 16:46:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8820 states. [2022-03-15 16:46:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8820 to 5516. [2022-03-15 16:46:08,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.4357207615593834) internal successors, (18948), 5515 states have internal predecessors, (18948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 18948 transitions. [2022-03-15 16:46:08,594 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 18948 transitions. Word has length 30 [2022-03-15 16:46:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:08,594 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 18948 transitions. [2022-03-15 16:46:08,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 18948 transitions. [2022-03-15 16:46:08,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:08,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:08,601 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:08,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 16:46:08,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-15 16:46:08,802 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:08,803 INFO L85 PathProgramCache]: Analyzing trace with hash -385351846, now seen corresponding path program 40 times [2022-03-15 16:46:08,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:08,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916435982] [2022-03-15 16:46:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:09,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:09,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916435982] [2022-03-15 16:46:09,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916435982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:09,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720690706] [2022-03-15 16:46:09,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:09,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:09,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:09,220 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:09,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 16:46:09,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:09,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:09,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:46:09,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:09,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:09,516 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-15 16:46:09,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-15 16:46:09,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:09,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:09,928 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:46:09,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 69 [2022-03-15 16:46:09,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:09,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:09,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:46:10,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:10,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:10,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:10,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:46:10,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:10,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:10,248 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:10,248 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 23 treesize of output 50 [2022-03-15 16:46:10,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:10,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720690706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:10,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:10,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:46:10,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252552833] [2022-03-15 16:46:10,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:10,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:46:10,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:10,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:46:10,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:46:10,520 INFO L87 Difference]: Start difference. First operand 5516 states and 18948 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:14,319 INFO L93 Difference]: Finished difference Result 10245 states and 33277 transitions. [2022-03-15 16:46:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:46:14,319 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:46:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:14,336 INFO L225 Difference]: With dead ends: 10245 [2022-03-15 16:46:14,337 INFO L226 Difference]: Without dead ends: 10152 [2022-03-15 16:46:14,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2397 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1109, Invalid=6901, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:46:14,337 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 499 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1906 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 507 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:14,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 512 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1906 Invalid, 0 Unknown, 507 Unchecked, 1.0s Time] [2022-03-15 16:46:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2022-03-15 16:46:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 5505. [2022-03-15 16:46:14,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 3.4353197674418605) internal successors, (18908), 5504 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:14,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 18908 transitions. [2022-03-15 16:46:14,450 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 18908 transitions. Word has length 30 [2022-03-15 16:46:14,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:14,450 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 18908 transitions. [2022-03-15 16:46:14,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:14,450 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 18908 transitions. [2022-03-15 16:46:14,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:14,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:14,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:14,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-15 16:46:14,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:14,657 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:14,658 INFO L85 PathProgramCache]: Analyzing trace with hash 453798878, now seen corresponding path program 41 times [2022-03-15 16:46:14,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:14,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264350972] [2022-03-15 16:46:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:14,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:14,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:14,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:14,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264350972] [2022-03-15 16:46:14,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264350972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:14,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573062715] [2022-03-15 16:46:14,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:14,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:14,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:14,982 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:14,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 16:46:15,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:15,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:15,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:46:15,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:15,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:15,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:15,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2022-03-15 16:46:15,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:15,304 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 21 treesize of output 26 [2022-03-15 16:46:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:15,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:15,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:15,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:15,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:46:15,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:15,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:15,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:46:16,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:16,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:16,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:16,055 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 34 treesize of output 61 [2022-03-15 16:46:16,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:16,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:16,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:16,073 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 24 treesize of output 51 [2022-03-15 16:46:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:16,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573062715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:16,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:16,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 16:46:16,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683210395] [2022-03-15 16:46:16,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:16,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:46:16,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:46:16,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:46:16,302 INFO L87 Difference]: Start difference. First operand 5505 states and 18908 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:20,089 INFO L93 Difference]: Finished difference Result 9408 states and 30262 transitions. [2022-03-15 16:46:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-15 16:46:20,089 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-03-15 16:46:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:20,106 INFO L225 Difference]: With dead ends: 9408 [2022-03-15 16:46:20,107 INFO L226 Difference]: Without dead ends: 9330 [2022-03-15 16:46:20,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=958, Invalid=6014, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 16:46:20,107 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 445 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 2340 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 462 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:20,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 494 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2340 Invalid, 0 Unknown, 462 Unchecked, 1.2s Time] [2022-03-15 16:46:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2022-03-15 16:46:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 5513. [2022-03-15 16:46:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5513 states, 5512 states have (on average 3.434687953555878) internal successors, (18932), 5512 states have internal predecessors, (18932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5513 states to 5513 states and 18932 transitions. [2022-03-15 16:46:20,212 INFO L78 Accepts]: Start accepts. Automaton has 5513 states and 18932 transitions. Word has length 30 [2022-03-15 16:46:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 5513 states and 18932 transitions. [2022-03-15 16:46:20,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 5513 states and 18932 transitions. [2022-03-15 16:46:20,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:20,220 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:20,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:20,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 16:46:20,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:20,420 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:20,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:20,420 INFO L85 PathProgramCache]: Analyzing trace with hash 510504110, now seen corresponding path program 42 times [2022-03-15 16:46:20,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:20,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426260494] [2022-03-15 16:46:20,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:20,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:20,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:20,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:20,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426260494] [2022-03-15 16:46:20,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426260494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:20,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646273841] [2022-03-15 16:46:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:46:20,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:20,828 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:20,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 16:46:20,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:46:20,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:20,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:46:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:21,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:21,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:21,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2022-03-15 16:46:21,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-03-15 16:46:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:21,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:21,606 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:46:21,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:46:21,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:21,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:21,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:46:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:21,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:21,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:21,921 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 34 treesize of output 61 [2022-03-15 16:46:21,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:21,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:21,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:21,940 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 24 treesize of output 51 [2022-03-15 16:46:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:22,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646273841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:22,152 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:22,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 33 [2022-03-15 16:46:22,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686729430] [2022-03-15 16:46:22,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:22,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:46:22,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:46:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:46:22,153 INFO L87 Difference]: Start difference. First operand 5513 states and 18932 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:27,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:27,328 INFO L93 Difference]: Finished difference Result 10189 states and 33046 transitions. [2022-03-15 16:46:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:46:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:46:27,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:27,349 INFO L225 Difference]: With dead ends: 10189 [2022-03-15 16:46:27,349 INFO L226 Difference]: Without dead ends: 10093 [2022-03-15 16:46:27,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3046 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1243, Invalid=8857, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 16:46:27,350 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 520 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 3438 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 4134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 3438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 481 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:27,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 924 Invalid, 4134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 3438 Invalid, 0 Unknown, 481 Unchecked, 1.7s Time] [2022-03-15 16:46:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10093 states. [2022-03-15 16:46:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10093 to 5505. [2022-03-15 16:46:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5505 states, 5504 states have (on average 3.4353197674418605) internal successors, (18908), 5504 states have internal predecessors, (18908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5505 states to 5505 states and 18908 transitions. [2022-03-15 16:46:27,477 INFO L78 Accepts]: Start accepts. Automaton has 5505 states and 18908 transitions. Word has length 30 [2022-03-15 16:46:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:27,477 INFO L470 AbstractCegarLoop]: Abstraction has 5505 states and 18908 transitions. [2022-03-15 16:46:27,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5505 states and 18908 transitions. [2022-03-15 16:46:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:27,485 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:27,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:27,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 16:46:27,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-15 16:46:27,686 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:27,686 INFO L85 PathProgramCache]: Analyzing trace with hash 330856445, now seen corresponding path program 38 times [2022-03-15 16:46:27,686 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:27,686 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207578966] [2022-03-15 16:46:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:27,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:28,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:28,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:28,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207578966] [2022-03-15 16:46:28,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207578966] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:28,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721585749] [2022-03-15 16:46:28,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:46:28,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:28,069 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:28,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 16:46:28,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:46:28,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:28,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:46:28,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:28,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:28,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2022-03-15 16:46:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:28,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-03-15 16:46:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:28,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:28,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:28,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 56 [2022-03-15 16:46:28,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:28,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:28,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 44 [2022-03-15 16:46:29,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:29,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:29,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:29,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:46:29,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:29,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:29,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:29,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:46:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:29,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721585749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:29,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:29,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 34 [2022-03-15 16:46:29,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24637806] [2022-03-15 16:46:29,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:29,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:46:29,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:29,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:46:29,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:46:29,103 INFO L87 Difference]: Start difference. First operand 5505 states and 18908 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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) [2022-03-15 16:46:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:35,449 INFO L93 Difference]: Finished difference Result 10065 states and 32925 transitions. [2022-03-15 16:46:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-15 16:46:35,449 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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 30 [2022-03-15 16:46:35,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:35,466 INFO L225 Difference]: With dead ends: 10065 [2022-03-15 16:46:35,466 INFO L226 Difference]: Without dead ends: 9949 [2022-03-15 16:46:35,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6811 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=2468, Invalid=15622, Unknown=0, NotChecked=0, Total=18090 [2022-03-15 16:46:35,467 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 554 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 3022 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 3022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:35,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [554 Valid, 681 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 3022 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-15 16:46:35,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9949 states. [2022-03-15 16:46:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9949 to 5556. [2022-03-15 16:46:35,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5556 states, 5555 states have (on average 3.4333033303330334) internal successors, (19072), 5555 states have internal predecessors, (19072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:35,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5556 states to 5556 states and 19072 transitions. [2022-03-15 16:46:35,566 INFO L78 Accepts]: Start accepts. Automaton has 5556 states and 19072 transitions. Word has length 30 [2022-03-15 16:46:35,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:35,566 INFO L470 AbstractCegarLoop]: Abstraction has 5556 states and 19072 transitions. [2022-03-15 16:46:35,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 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) [2022-03-15 16:46:35,566 INFO L276 IsEmpty]: Start isEmpty. Operand 5556 states and 19072 transitions. [2022-03-15 16:46:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:35,573 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:35,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:35,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 16:46:35,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:35,774 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:35,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1561065469, now seen corresponding path program 39 times [2022-03-15 16:46:35,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:35,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762680115] [2022-03-15 16:46:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:35,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:36,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:36,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:36,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762680115] [2022-03-15 16:46:36,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762680115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:36,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746416370] [2022-03-15 16:46:36,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:46:36,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:36,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:36,135 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:36,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 16:46:36,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:46:36,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:46:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:36,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:36,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:36,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:36,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 65 [2022-03-15 16:46:36,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:36,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:36,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:36,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 75 [2022-03-15 16:46:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:36,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:37,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:37,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 43 [2022-03-15 16:46:37,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:37,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:37,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:37,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 7 [2022-03-15 16:46:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:37,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746416370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:37,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:37,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-03-15 16:46:37,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815967391] [2022-03-15 16:46:37,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:37,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:46:37,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:37,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:46:37,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:46:37,306 INFO L87 Difference]: Start difference. First operand 5556 states and 19072 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2022-03-15 16:46:43,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:43,263 INFO L93 Difference]: Finished difference Result 10415 states and 33999 transitions. [2022-03-15 16:46:43,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 16:46:43,264 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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 30 [2022-03-15 16:46:43,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:43,283 INFO L225 Difference]: With dead ends: 10415 [2022-03-15 16:46:43,283 INFO L226 Difference]: Without dead ends: 10290 [2022-03-15 16:46:43,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4383 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1653, Invalid=12867, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 16:46:43,285 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 518 mSDsluCounter, 1633 mSDsCounter, 0 mSdLazyCounter, 3217 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 4601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:43,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1036 Invalid, 4601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3217 Invalid, 0 Unknown, 1218 Unchecked, 1.5s Time] [2022-03-15 16:46:43,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2022-03-15 16:46:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 5927. [2022-03-15 16:46:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5927 states, 5926 states have (on average 3.4206884913938578) internal successors, (20271), 5926 states have internal predecessors, (20271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5927 states to 5927 states and 20271 transitions. [2022-03-15 16:46:43,428 INFO L78 Accepts]: Start accepts. Automaton has 5927 states and 20271 transitions. Word has length 30 [2022-03-15 16:46:43,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:43,428 INFO L470 AbstractCegarLoop]: Abstraction has 5927 states and 20271 transitions. [2022-03-15 16:46:43,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2022-03-15 16:46:43,428 INFO L276 IsEmpty]: Start isEmpty. Operand 5927 states and 20271 transitions. [2022-03-15 16:46:43,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:43,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:43,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:43,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 16:46:43,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:43,646 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1598828051, now seen corresponding path program 40 times [2022-03-15 16:46:43,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:43,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370067489] [2022-03-15 16:46:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:43,992 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:43,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370067489] [2022-03-15 16:46:43,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370067489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:43,992 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996083326] [2022-03-15 16:46:43,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:46:43,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:43,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:43,993 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:43,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 16:46:44,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:46:44,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:44,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:46:44,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:44,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-03-15 16:46:44,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:44,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-03-15 16:46:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:44,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:44,651 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:46:44,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:46:44,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:44,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-15 16:46:44,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:44,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:46:44,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:44,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:44,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:46:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:44,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996083326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:44,855 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:44,855 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 29 [2022-03-15 16:46:44,855 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127688452] [2022-03-15 16:46:44,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:44,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 16:46:44,855 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:44,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 16:46:44,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-15 16:46:44,856 INFO L87 Difference]: Start difference. First operand 5927 states and 20271 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-03-15 16:46:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:50,050 INFO L93 Difference]: Finished difference Result 9568 states and 31970 transitions. [2022-03-15 16:46:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-15 16:46:50,050 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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 30 [2022-03-15 16:46:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:50,068 INFO L225 Difference]: With dead ends: 9568 [2022-03-15 16:46:50,068 INFO L226 Difference]: Without dead ends: 9535 [2022-03-15 16:46:50,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3977 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1488, Invalid=10502, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 16:46:50,069 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 406 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 2677 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 2677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:50,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 492 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 2677 Invalid, 0 Unknown, 98 Unchecked, 1.3s Time] [2022-03-15 16:46:50,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9535 states. [2022-03-15 16:46:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9535 to 5943. [2022-03-15 16:46:50,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5943 states, 5942 states have (on average 3.418209357118815) internal successors, (20311), 5942 states have internal predecessors, (20311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5943 states to 5943 states and 20311 transitions. [2022-03-15 16:46:50,185 INFO L78 Accepts]: Start accepts. Automaton has 5943 states and 20311 transitions. Word has length 30 [2022-03-15 16:46:50,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:50,185 INFO L470 AbstractCegarLoop]: Abstraction has 5943 states and 20311 transitions. [2022-03-15 16:46:50,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 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) [2022-03-15 16:46:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 5943 states and 20311 transitions. [2022-03-15 16:46:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:50,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:50,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:50,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-15 16:46:50,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-15 16:46:50,395 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:50,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1121423259, now seen corresponding path program 41 times [2022-03-15 16:46:50,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:50,395 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034757993] [2022-03-15 16:46:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:50,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:50,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034757993] [2022-03-15 16:46:50,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034757993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:50,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789664635] [2022-03-15 16:46:50,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:46:50,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:50,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:50,739 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:50,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 16:46:50,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:46:50,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:46:50,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:46:50,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:51,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:51,184 INFO L353 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2022-03-15 16:46:51,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 198 treesize of output 164 [2022-03-15 16:46:51,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-15 16:46:51,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:51,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:51,472 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:46:51,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:46:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:51,490 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 26 treesize of output 55 [2022-03-15 16:46:51,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:51,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:46:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:51,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:51,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:46:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:51,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789664635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:51,690 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:51,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-03-15 16:46:51,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415677598] [2022-03-15 16:46:51,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:51,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:46:51,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:51,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:46:51,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:46:51,691 INFO L87 Difference]: Start difference. First operand 5943 states and 20311 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:46:55,819 INFO L93 Difference]: Finished difference Result 9113 states and 30304 transitions. [2022-03-15 16:46:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 16:46:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:46:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:46:55,835 INFO L225 Difference]: With dead ends: 9113 [2022-03-15 16:46:55,835 INFO L226 Difference]: Without dead ends: 9066 [2022-03-15 16:46:55,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1020, Invalid=6990, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 16:46:55,836 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 344 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 2562 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 2562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:46:55,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 479 Invalid, 2772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 2562 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-15 16:46:55,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2022-03-15 16:46:55,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 5977. [2022-03-15 16:46:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5977 states, 5976 states have (on average 3.4129852744310574) internal successors, (20396), 5976 states have internal predecessors, (20396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5977 states to 5977 states and 20396 transitions. [2022-03-15 16:46:55,945 INFO L78 Accepts]: Start accepts. Automaton has 5977 states and 20396 transitions. Word has length 30 [2022-03-15 16:46:55,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:46:55,945 INFO L470 AbstractCegarLoop]: Abstraction has 5977 states and 20396 transitions. [2022-03-15 16:46:55,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:46:55,945 INFO L276 IsEmpty]: Start isEmpty. Operand 5977 states and 20396 transitions. [2022-03-15 16:46:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:46:55,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:46:55,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:46:55,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-15 16:46:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:56,153 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:46:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:46:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash 333797096, now seen corresponding path program 43 times [2022-03-15 16:46:56,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:46:56,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546637542] [2022-03-15 16:46:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:46:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:46:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:56,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:46:56,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546637542] [2022-03-15 16:46:56,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546637542] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:46:56,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538471609] [2022-03-15 16:46:56,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:46:56,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:46:56,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:46:56,521 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:46:56,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 16:46:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:46:56,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:46:56,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:46:56,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:56,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:56,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-15 16:46:56,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:46:56,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:56,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-03-15 16:46:56,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:56,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:46:57,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:57,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:57,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:46:57,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:57,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:57,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:46:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:57,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:57,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:57,587 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 60 [2022-03-15 16:46:57,591 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:57,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:46:57,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:46:57,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:46:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:46:57,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538471609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:46:57,836 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:46:57,836 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 16:46:57,836 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425847557] [2022-03-15 16:46:57,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:46:57,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:46:57,836 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:46:57,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:46:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=842, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:46:57,837 INFO L87 Difference]: Start difference. First operand 5977 states and 20396 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:03,430 INFO L93 Difference]: Finished difference Result 13365 states and 41408 transitions. [2022-03-15 16:47:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-15 16:47:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 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 30 [2022-03-15 16:47:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:03,455 INFO L225 Difference]: With dead ends: 13365 [2022-03-15 16:47:03,455 INFO L226 Difference]: Without dead ends: 13335 [2022-03-15 16:47:03,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4639 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2494, Invalid=9716, Unknown=0, NotChecked=0, Total=12210 [2022-03-15 16:47:03,456 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 792 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:03,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [792 Valid, 547 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 2279 Invalid, 0 Unknown, 92 Unchecked, 1.3s Time] [2022-03-15 16:47:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2022-03-15 16:47:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 6037. [2022-03-15 16:47:03,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6037 states, 6036 states have (on average 3.421139827700464) internal successors, (20650), 6036 states have internal predecessors, (20650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6037 states to 6037 states and 20650 transitions. [2022-03-15 16:47:03,605 INFO L78 Accepts]: Start accepts. Automaton has 6037 states and 20650 transitions. Word has length 30 [2022-03-15 16:47:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:03,605 INFO L470 AbstractCegarLoop]: Abstraction has 6037 states and 20650 transitions. [2022-03-15 16:47:03,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 33 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 6037 states and 20650 transitions. [2022-03-15 16:47:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:47:03,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:03,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:03,629 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 16:47:03,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:03,814 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1359796828, now seen corresponding path program 44 times [2022-03-15 16:47:03,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:03,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045574801] [2022-03-15 16:47:03,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:04,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:04,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045574801] [2022-03-15 16:47:04,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045574801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:04,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379287085] [2022-03-15 16:47:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:47:04,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:04,180 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:04,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 16:47:04,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:47:04,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:47:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:04,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:04,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:04,460 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-15 16:47:04,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 8 [2022-03-15 16:47:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:04,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:04,899 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-03-15 16:47:04,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 69 [2022-03-15 16:47:04,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:04,923 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:04,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:47:05,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:05,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:05,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:05,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 60 [2022-03-15 16:47:05,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:05,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:05,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:05,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:47:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:05,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379287085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:05,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:05,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2022-03-15 16:47:05,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075508340] [2022-03-15 16:47:05,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:05,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:47:05,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:05,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:47:05,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=844, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:47:05,456 INFO L87 Difference]: Start difference. First operand 6037 states and 20650 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:15,629 INFO L93 Difference]: Finished difference Result 12809 states and 39880 transitions. [2022-03-15 16:47:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-03-15 16:47:15,629 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:47:15,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:15,652 INFO L225 Difference]: With dead ends: 12809 [2022-03-15 16:47:15,653 INFO L226 Difference]: Without dead ends: 12750 [2022-03-15 16:47:15,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10503 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3385, Invalid=23347, Unknown=0, NotChecked=0, Total=26732 [2022-03-15 16:47:15,654 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 700 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:15,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 797 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2597 Invalid, 0 Unknown, 381 Unchecked, 1.6s Time] [2022-03-15 16:47:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12750 states. [2022-03-15 16:47:15,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12750 to 6136. [2022-03-15 16:47:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6136 states, 6135 states have (on average 3.4293398533007333) internal successors, (21039), 6135 states have internal predecessors, (21039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6136 states to 6136 states and 21039 transitions. [2022-03-15 16:47:15,832 INFO L78 Accepts]: Start accepts. Automaton has 6136 states and 21039 transitions. Word has length 30 [2022-03-15 16:47:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:15,832 INFO L470 AbstractCegarLoop]: Abstraction has 6136 states and 21039 transitions. [2022-03-15 16:47:15,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:15,833 INFO L276 IsEmpty]: Start isEmpty. Operand 6136 states and 21039 transitions. [2022-03-15 16:47:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:47:15,840 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:15,840 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:15,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-15 16:47:16,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-15 16:47:16,041 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:16,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:16,041 INFO L85 PathProgramCache]: Analyzing trace with hash 445751308, now seen corresponding path program 45 times [2022-03-15 16:47:16,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:16,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104578698] [2022-03-15 16:47:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:16,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:16,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:16,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:16,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104578698] [2022-03-15 16:47:16,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104578698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:16,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327487230] [2022-03-15 16:47:16,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:47:16,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:16,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:16,392 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:16,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 16:47:16,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:47:16,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:16,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:47:16,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:16,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:16,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:16,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 39 [2022-03-15 16:47:16,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:16,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:16,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 44 treesize of output 52 [2022-03-15 16:47:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:16,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:17,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:17,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 93 [2022-03-15 16:47:17,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:17,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2022-03-15 16:47:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:18,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327487230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:18,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:18,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-03-15 16:47:18,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220980663] [2022-03-15 16:47:18,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:18,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:47:18,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:47:18,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:47:18,409 INFO L87 Difference]: Start difference. First operand 6136 states and 21039 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:27,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:27,587 INFO L93 Difference]: Finished difference Result 14192 states and 43942 transitions. [2022-03-15 16:47:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-15 16:47:27,587 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 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 30 [2022-03-15 16:47:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:27,611 INFO L225 Difference]: With dead ends: 14192 [2022-03-15 16:47:27,611 INFO L226 Difference]: Without dead ends: 14143 [2022-03-15 16:47:27,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 43 SyntacticMatches, 10 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9695 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=4123, Invalid=18527, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 16:47:27,612 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 973 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 973 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 3769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1502 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:27,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [973 Valid, 666 Invalid, 3769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 1887 Invalid, 0 Unknown, 1502 Unchecked, 1.2s Time] [2022-03-15 16:47:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14143 states. [2022-03-15 16:47:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14143 to 6117. [2022-03-15 16:47:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6117 states, 6116 states have (on average 3.4270765206017004) internal successors, (20960), 6116 states have internal predecessors, (20960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6117 states to 6117 states and 20960 transitions. [2022-03-15 16:47:27,747 INFO L78 Accepts]: Start accepts. Automaton has 6117 states and 20960 transitions. Word has length 30 [2022-03-15 16:47:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:27,747 INFO L470 AbstractCegarLoop]: Abstraction has 6117 states and 20960 transitions. [2022-03-15 16:47:27,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:27,748 INFO L276 IsEmpty]: Start isEmpty. Operand 6117 states and 20960 transitions. [2022-03-15 16:47:27,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:47:27,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:27,756 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:27,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 16:47:27,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:27,956 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:27,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:27,957 INFO L85 PathProgramCache]: Analyzing trace with hash 276304091, now seen corresponding path program 42 times [2022-03-15 16:47:27,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:27,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397000714] [2022-03-15 16:47:27,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:27,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:27,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:28,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:28,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397000714] [2022-03-15 16:47:28,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397000714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:28,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981977208] [2022-03-15 16:47:28,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:47:28,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:28,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:28,428 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:28,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 16:47:28,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:47:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:28,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:47:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:28,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:28,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:28,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-03-15 16:47:28,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:28,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:28,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:28,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 7 [2022-03-15 16:47:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:28,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:29,193 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:47:29,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:47:29,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:29,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:29,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:29,211 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 26 treesize of output 55 [2022-03-15 16:47:29,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:29,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:29,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:29,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:47:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:29,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:29,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:29,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:47:29,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:29,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981977208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:29,385 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:29,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-15 16:47:29,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439403541] [2022-03-15 16:47:29,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:29,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:47:29,385 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:47:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:47:29,386 INFO L87 Difference]: Start difference. First operand 6117 states and 20960 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:47:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:40,213 INFO L93 Difference]: Finished difference Result 11983 states and 39131 transitions. [2022-03-15 16:47:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-03-15 16:47:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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 30 [2022-03-15 16:47:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:40,236 INFO L225 Difference]: With dead ends: 11983 [2022-03-15 16:47:40,236 INFO L226 Difference]: Without dead ends: 11868 [2022-03-15 16:47:40,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11971 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=4245, Invalid=25857, Unknown=0, NotChecked=0, Total=30102 [2022-03-15 16:47:40,238 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 799 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 3323 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 799 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 3323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:40,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [799 Valid, 624 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 3323 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:47:40,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11868 states. [2022-03-15 16:47:40,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11868 to 6146. [2022-03-15 16:47:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6146 states, 6145 states have (on average 3.4318958502847843) internal successors, (21089), 6145 states have internal predecessors, (21089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:40,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6146 states to 6146 states and 21089 transitions. [2022-03-15 16:47:40,374 INFO L78 Accepts]: Start accepts. Automaton has 6146 states and 21089 transitions. Word has length 30 [2022-03-15 16:47:40,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:40,374 INFO L470 AbstractCegarLoop]: Abstraction has 6146 states and 21089 transitions. [2022-03-15 16:47:40,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-03-15 16:47:40,374 INFO L276 IsEmpty]: Start isEmpty. Operand 6146 states and 21089 transitions. [2022-03-15 16:47:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:47:40,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:40,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:40,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 16:47:40,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:40,583 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:40,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1022527905, now seen corresponding path program 43 times [2022-03-15 16:47:40,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:40,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059528576] [2022-03-15 16:47:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:40,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:40,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059528576] [2022-03-15 16:47:40,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059528576] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:40,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840590032] [2022-03-15 16:47:40,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:47:40,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:40,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:40,895 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:40,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 16:47:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:40,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:47:40,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:41,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:41,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-03-15 16:47:41,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-03-15 16:47:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:41,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:41,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:41,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-15 16:47:41,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,617 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:41,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-15 16:47:41,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:41,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:47:41,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:41,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:41,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:47:41,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:41,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840590032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:41,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:41,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 35 [2022-03-15 16:47:41,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213652584] [2022-03-15 16:47:41,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:41,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:47:41,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:41,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:47:41,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1081, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:47:41,742 INFO L87 Difference]: Start difference. First operand 6146 states and 21089 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:47:46,630 INFO L93 Difference]: Finished difference Result 12366 states and 40150 transitions. [2022-03-15 16:47:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 16:47:46,630 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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 30 [2022-03-15 16:47:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:47:46,653 INFO L225 Difference]: With dead ends: 12366 [2022-03-15 16:47:46,653 INFO L226 Difference]: Without dead ends: 12265 [2022-03-15 16:47:46,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4366 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1942, Invalid=11168, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 16:47:46,654 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 585 mSDsluCounter, 1882 mSDsCounter, 0 mSdLazyCounter, 3742 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 3943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-15 16:47:46,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 1317 Invalid, 3943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3742 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-15 16:47:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12265 states. [2022-03-15 16:47:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12265 to 6537. [2022-03-15 16:47:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6537 states, 6536 states have (on average 3.429620563035496) internal successors, (22416), 6536 states have internal predecessors, (22416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6537 states to 6537 states and 22416 transitions. [2022-03-15 16:47:46,808 INFO L78 Accepts]: Start accepts. Automaton has 6537 states and 22416 transitions. Word has length 30 [2022-03-15 16:47:46,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:47:46,808 INFO L470 AbstractCegarLoop]: Abstraction has 6537 states and 22416 transitions. [2022-03-15 16:47:46,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:47:46,808 INFO L276 IsEmpty]: Start isEmpty. Operand 6537 states and 22416 transitions. [2022-03-15 16:47:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:47:46,817 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:47:46,817 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:47:46,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 16:47:47,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:47,031 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:47:47,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:47:47,032 INFO L85 PathProgramCache]: Analyzing trace with hash 750579931, now seen corresponding path program 44 times [2022-03-15 16:47:47,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:47:47,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079783630] [2022-03-15 16:47:47,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:47:47,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:47:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:47:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:47,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:47:47,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079783630] [2022-03-15 16:47:47,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079783630] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:47:47,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764616267] [2022-03-15 16:47:47,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:47:47,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:47:47,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:47:47,348 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:47:47,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 16:47:47,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:47:47,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:47:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 16:47:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:47:47,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:47,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:47,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:47,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:47,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 60 [2022-03-15 16:47:47,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:47,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:47,765 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:47,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 88 [2022-03-15 16:47:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:47,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:47:48,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:48,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-15 16:47:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:47:48,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-15 16:47:48,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:48,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:47:48,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:47:48,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:47:48,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:47:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:47:48,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764616267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:47:48,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:47:48,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 38 [2022-03-15 16:47:48,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048639695] [2022-03-15 16:47:48,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:47:48,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-15 16:47:48,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:47:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-15 16:47:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1199, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 16:47:48,557 INFO L87 Difference]: Start difference. First operand 6537 states and 22416 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2022-03-15 16:48:36,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:36,149 INFO L93 Difference]: Finished difference Result 23266 states and 73315 transitions. [2022-03-15 16:48:36,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 466 states. [2022-03-15 16:48:36,149 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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 30 [2022-03-15 16:48:36,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:36,194 INFO L225 Difference]: With dead ends: 23266 [2022-03-15 16:48:36,194 INFO L226 Difference]: Without dead ends: 23000 [2022-03-15 16:48:36,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 494 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116960 ImplicationChecksByTransitivity, 42.8s TimeCoverageRelationStatistics Valid=34708, Invalid=210812, Unknown=0, NotChecked=0, Total=245520 [2022-03-15 16:48:36,203 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 1936 mSDsluCounter, 3600 mSDsCounter, 0 mSdLazyCounter, 6909 mSolverCounterSat, 1132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1936 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 10809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1132 IncrementalHoareTripleChecker+Valid, 6909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2768 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:36,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1936 Valid, 1911 Invalid, 10809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1132 Valid, 6909 Invalid, 0 Unknown, 2768 Unchecked, 4.6s Time] [2022-03-15 16:48:36,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23000 states. [2022-03-15 16:48:36,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23000 to 7230. [2022-03-15 16:48:36,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7230 states, 7229 states have (on average 3.460229630654309) internal successors, (25014), 7229 states have internal predecessors, (25014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:36,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7230 states to 7230 states and 25014 transitions. [2022-03-15 16:48:36,447 INFO L78 Accepts]: Start accepts. Automaton has 7230 states and 25014 transitions. Word has length 30 [2022-03-15 16:48:36,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:36,447 INFO L470 AbstractCegarLoop]: Abstraction has 7230 states and 25014 transitions. [2022-03-15 16:48:36,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 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) [2022-03-15 16:48:36,447 INFO L276 IsEmpty]: Start isEmpty. Operand 7230 states and 25014 transitions. [2022-03-15 16:48:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:48:36,457 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:36,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:48:36,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:36,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-15 16:48:36,658 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:36,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1836105554, now seen corresponding path program 46 times [2022-03-15 16:48:36,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:36,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105763620] [2022-03-15 16:48:36,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:36,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:36,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:36,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105763620] [2022-03-15 16:48:36,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105763620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:37,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664018186] [2022-03-15 16:48:37,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:48:37,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:37,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:37,002 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:37,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 16:48:37,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:48:37,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:37,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:48:37,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:37,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:37,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:37,427 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2022-03-15 16:48:37,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:37,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:37,433 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-15 16:48:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:37,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:37,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:37,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:37,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:48:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:37,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:37,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:48:38,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:38,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:38,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:38,144 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 60 [2022-03-15 16:48:38,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:38,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:38,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:38,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 50 [2022-03-15 16:48:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:38,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664018186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:38,389 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:38,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 32 [2022-03-15 16:48:38,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79349592] [2022-03-15 16:48:38,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:38,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:48:38,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:38,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:48:38,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:48:38,389 INFO L87 Difference]: Start difference. First operand 7230 states and 25014 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:45,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:45,068 INFO L93 Difference]: Finished difference Result 13524 states and 43551 transitions. [2022-03-15 16:48:45,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 16:48:45,069 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 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 30 [2022-03-15 16:48:45,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:45,093 INFO L225 Difference]: With dead ends: 13524 [2022-03-15 16:48:45,093 INFO L226 Difference]: Without dead ends: 13490 [2022-03-15 16:48:45,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5645 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2566, Invalid=12196, Unknown=0, NotChecked=0, Total=14762 [2022-03-15 16:48:45,094 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 830 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2298 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 2298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 609 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:45,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [830 Valid, 521 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 2298 Invalid, 0 Unknown, 609 Unchecked, 1.4s Time] [2022-03-15 16:48:45,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13490 states. [2022-03-15 16:48:45,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13490 to 7248. [2022-03-15 16:48:45,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7248 states, 7247 states have (on average 3.4600524354905478) internal successors, (25075), 7247 states have internal predecessors, (25075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7248 states to 7248 states and 25075 transitions. [2022-03-15 16:48:45,246 INFO L78 Accepts]: Start accepts. Automaton has 7248 states and 25075 transitions. Word has length 30 [2022-03-15 16:48:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:45,246 INFO L470 AbstractCegarLoop]: Abstraction has 7248 states and 25075 transitions. [2022-03-15 16:48:45,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7248 states and 25075 transitions. [2022-03-15 16:48:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:48:45,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:45,256 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:48:45,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:45,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:45,456 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:45,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1822394888, now seen corresponding path program 47 times [2022-03-15 16:48:45,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:45,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057249449] [2022-03-15 16:48:45,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:45,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:45,808 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:45,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:45,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057249449] [2022-03-15 16:48:45,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057249449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:45,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412230479] [2022-03-15 16:48:45,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:48:45,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:45,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:45,809 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:45,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 16:48:45,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:48:45,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 16:48:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:46,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:46,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:46,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:46,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2022-03-15 16:48:46,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:46,131 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 21 treesize of output 26 [2022-03-15 16:48:46,222 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:46,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:46,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:46,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:48:46,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:46,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:46,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:48:46,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:46,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:46,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:46,815 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 60 [2022-03-15 16:48:46,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:46,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:46,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:46,833 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 23 treesize of output 50 [2022-03-15 16:48:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:47,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412230479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:47,102 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:47,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-03-15 16:48:47,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368197567] [2022-03-15 16:48:47,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:47,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 16:48:47,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:47,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 16:48:47,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2022-03-15 16:48:47,103 INFO L87 Difference]: Start difference. First operand 7248 states and 25075 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:48:57,302 INFO L93 Difference]: Finished difference Result 18143 states and 57239 transitions. [2022-03-15 16:48:57,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-03-15 16:48:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 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 30 [2022-03-15 16:48:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:48:57,338 INFO L225 Difference]: With dead ends: 18143 [2022-03-15 16:48:57,338 INFO L226 Difference]: Without dead ends: 17978 [2022-03-15 16:48:57,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 44 SyntacticMatches, 9 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11077 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3738, Invalid=22344, Unknown=0, NotChecked=0, Total=26082 [2022-03-15 16:48:57,339 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 771 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 2581 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 4000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 2581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1177 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:48:57,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 705 Invalid, 4000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 2581 Invalid, 0 Unknown, 1177 Unchecked, 1.5s Time] [2022-03-15 16:48:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17978 states. [2022-03-15 16:48:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17978 to 7278. [2022-03-15 16:48:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7278 states, 7277 states have (on average 3.4595300261096606) internal successors, (25175), 7277 states have internal predecessors, (25175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7278 states to 7278 states and 25175 transitions. [2022-03-15 16:48:57,542 INFO L78 Accepts]: Start accepts. Automaton has 7278 states and 25175 transitions. Word has length 30 [2022-03-15 16:48:57,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:48:57,542 INFO L470 AbstractCegarLoop]: Abstraction has 7278 states and 25175 transitions. [2022-03-15 16:48:57,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:48:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 7278 states and 25175 transitions. [2022-03-15 16:48:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:48:57,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:48:57,553 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:48:57,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 16:48:57,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:57,753 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:48:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:48:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1876694929, now seen corresponding path program 45 times [2022-03-15 16:48:57,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:48:57,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323821929] [2022-03-15 16:48:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:48:57,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:48:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:48:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:58,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:48:58,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323821929] [2022-03-15 16:48:58,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323821929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:48:58,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280193512] [2022-03-15 16:48:58,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:48:58,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:48:58,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:48:58,117 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:48:58,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 16:48:58,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:48:58,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:48:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:48:58,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:48:58,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:58,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:58,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 61 [2022-03-15 16:48:58,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:58,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:48:58,428 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 87 treesize of output 103 [2022-03-15 16:48:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:58,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:48:59,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:59,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:59,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:59,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:59,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 44 [2022-03-15 16:48:59,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:59,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:48:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:48:59,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 9 [2022-03-15 16:48:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:48:59,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280193512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:48:59,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:48:59,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 37 [2022-03-15 16:48:59,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86439062] [2022-03-15 16:48:59,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:48:59,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 16:48:59,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:48:59,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 16:48:59,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1181, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 16:48:59,381 INFO L87 Difference]: Start difference. First operand 7278 states and 25175 transitions. Second operand has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:04,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:04,182 INFO L93 Difference]: Finished difference Result 10861 states and 36289 transitions. [2022-03-15 16:49:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-15 16:49:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 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 30 [2022-03-15 16:49:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:04,202 INFO L225 Difference]: With dead ends: 10861 [2022-03-15 16:49:04,202 INFO L226 Difference]: Without dead ends: 10816 [2022-03-15 16:49:04,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3219 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1387, Invalid=9533, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 16:49:04,203 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 550 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 2974 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 3723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 584 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:04,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 1018 Invalid, 3723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2974 Invalid, 0 Unknown, 584 Unchecked, 1.4s Time] [2022-03-15 16:49:04,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10816 states. [2022-03-15 16:49:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10816 to 7318. [2022-03-15 16:49:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7318 states, 7317 states have (on average 3.4601612682793497) internal successors, (25318), 7317 states have internal predecessors, (25318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:04,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7318 states to 7318 states and 25318 transitions. [2022-03-15 16:49:04,338 INFO L78 Accepts]: Start accepts. Automaton has 7318 states and 25318 transitions. Word has length 30 [2022-03-15 16:49:04,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:04,338 INFO L470 AbstractCegarLoop]: Abstraction has 7318 states and 25318 transitions. [2022-03-15 16:49:04,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.864864864864865) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:04,338 INFO L276 IsEmpty]: Start isEmpty. Operand 7318 states and 25318 transitions. [2022-03-15 16:49:04,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:49:04,348 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:04,348 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:49:04,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 16:49:04,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:04,549 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:04,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:04,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2016344273, now seen corresponding path program 46 times [2022-03-15 16:49:04,549 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:04,549 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76041382] [2022-03-15 16:49:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:04,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:04,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:04,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76041382] [2022-03-15 16:49:04,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76041382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:04,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367154842] [2022-03-15 16:49:04,989 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:49:04,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:04,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:04,990 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:04,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 16:49:05,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:49:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:05,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 16:49:05,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:05,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:05,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:05,283 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:05,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 53 [2022-03-15 16:49:05,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:05,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:05,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:05,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 79 [2022-03-15 16:49:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:05,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:05,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,772 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:05,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-15 16:49:05,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:05,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-15 16:49:05,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:05,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:49:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:05,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:05,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:49:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:05,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367154842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:05,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:05,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 33 [2022-03-15 16:49:05,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794443442] [2022-03-15 16:49:05,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:05,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 16:49:05,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 16:49:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 16:49:05,915 INFO L87 Difference]: Start difference. First operand 7318 states and 25318 transitions. Second operand has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:11,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:11,229 INFO L93 Difference]: Finished difference Result 12931 states and 42701 transitions. [2022-03-15 16:49:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 16:49:11,229 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 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 30 [2022-03-15 16:49:11,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:11,252 INFO L225 Difference]: With dead ends: 12931 [2022-03-15 16:49:11,253 INFO L226 Difference]: Without dead ends: 12831 [2022-03-15 16:49:11,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1835, Invalid=10821, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 16:49:11,253 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 681 mSDsluCounter, 1749 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 681 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 3998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 3761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:11,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [681 Valid, 1309 Invalid, 3998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-15 16:49:11,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12831 states. [2022-03-15 16:49:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12831 to 7438. [2022-03-15 16:49:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7438 states, 7437 states have (on average 3.4599973107435793) internal successors, (25732), 7437 states have internal predecessors, (25732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:11,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7438 states to 7438 states and 25732 transitions. [2022-03-15 16:49:11,410 INFO L78 Accepts]: Start accepts. Automaton has 7438 states and 25732 transitions. Word has length 30 [2022-03-15 16:49:11,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:11,411 INFO L470 AbstractCegarLoop]: Abstraction has 7438 states and 25732 transitions. [2022-03-15 16:49:11,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9411764705882353) internal successors, (66), 33 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:11,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7438 states and 25732 transitions. [2022-03-15 16:49:11,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:49:11,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:11,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:49:11,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 16:49:11,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:11,622 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:11,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:11,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1105977056, now seen corresponding path program 48 times [2022-03-15 16:49:11,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:11,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999654663] [2022-03-15 16:49:11,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:11,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:11,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:11,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999654663] [2022-03-15 16:49:11,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999654663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:11,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805142450] [2022-03-15 16:49:11,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:49:11,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:11,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:11,944 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:11,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 16:49:11,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 16:49:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:11,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:49:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:12,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:12,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2022-03-15 16:49:12,325 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:12,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 52 [2022-03-15 16:49:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:12,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:12,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:12,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:12,972 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 34 treesize of output 61 [2022-03-15 16:49:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:12,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:12,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-15 16:49:13,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:13,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-15 16:49:13,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:13,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-15 16:49:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:13,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805142450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:13,184 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:13,184 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:49:13,184 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484797915] [2022-03-15 16:49:13,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:13,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:49:13,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:13,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:49:13,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:49:13,185 INFO L87 Difference]: Start difference. First operand 7438 states and 25732 transitions. Second operand has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:36,441 INFO L93 Difference]: Finished difference Result 16526 states and 54365 transitions. [2022-03-15 16:49:36,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2022-03-15 16:49:36,442 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:49:36,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:36,475 INFO L225 Difference]: With dead ends: 16526 [2022-03-15 16:49:36,475 INFO L226 Difference]: Without dead ends: 16473 [2022-03-15 16:49:36,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31631 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=9136, Invalid=63494, Unknown=0, NotChecked=0, Total=72630 [2022-03-15 16:49:36,478 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 1211 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1211 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 5362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1240 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:36,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1211 Valid, 1079 Invalid, 5362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [466 Valid, 3656 Invalid, 0 Unknown, 1240 Unchecked, 2.3s Time] [2022-03-15 16:49:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2022-03-15 16:49:36,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 7514. [2022-03-15 16:49:36,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 3.4654598695594303) internal successors, (26036), 7513 states have internal predecessors, (26036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 26036 transitions. [2022-03-15 16:49:36,679 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 26036 transitions. Word has length 30 [2022-03-15 16:49:36,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:36,679 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 26036 transitions. [2022-03-15 16:49:36,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:36,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 26036 transitions. [2022-03-15 16:49:36,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:49:36,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:36,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:49:36,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:36,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 16:49:36,892 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:36,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1637830820, now seen corresponding path program 49 times [2022-03-15 16:49:36,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:36,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081478973] [2022-03-15 16:49:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:36,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:37,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:37,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081478973] [2022-03-15 16:49:37,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081478973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:37,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011487417] [2022-03-15 16:49:37,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:49:37,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:37,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:37,254 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:37,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 16:49:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:49:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:37,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:37,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:37,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2022-03-15 16:49:37,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:49:37,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:37,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 3 [2022-03-15 16:49:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:37,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:38,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:38,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 69 [2022-03-15 16:49:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:38,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:38,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-15 16:49:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:38,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:38,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:38,406 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 60 [2022-03-15 16:49:38,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:38,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:38,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:38,425 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 23 treesize of output 50 [2022-03-15 16:49:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:38,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011487417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:38,655 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:38,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 33 [2022-03-15 16:49:38,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926435323] [2022-03-15 16:49:38,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:38,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 16:49:38,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 16:49:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 16:49:38,656 INFO L87 Difference]: Start difference. First operand 7514 states and 26036 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:49:43,848 INFO L93 Difference]: Finished difference Result 12709 states and 41187 transitions. [2022-03-15 16:49:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 16:49:43,849 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 16:49:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:49:43,876 INFO L225 Difference]: With dead ends: 12709 [2022-03-15 16:49:43,876 INFO L226 Difference]: Without dead ends: 12679 [2022-03-15 16:49:43,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4444 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1978, Invalid=10012, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 16:49:43,877 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 489 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 593 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:49:43,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 502 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1962 Invalid, 0 Unknown, 593 Unchecked, 1.1s Time] [2022-03-15 16:49:43,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12679 states. [2022-03-15 16:49:44,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12679 to 7518. [2022-03-15 16:49:44,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7518 states, 7517 states have (on average 3.4661434082745775) internal successors, (26055), 7517 states have internal predecessors, (26055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:44,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7518 states to 7518 states and 26055 transitions. [2022-03-15 16:49:44,047 INFO L78 Accepts]: Start accepts. Automaton has 7518 states and 26055 transitions. Word has length 30 [2022-03-15 16:49:44,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:49:44,047 INFO L470 AbstractCegarLoop]: Abstraction has 7518 states and 26055 transitions. [2022-03-15 16:49:44,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:49:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7518 states and 26055 transitions. [2022-03-15 16:49:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:49:44,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:49:44,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:49:44,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-15 16:49:44,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-15 16:49:44,259 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:49:44,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:49:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash 505670412, now seen corresponding path program 50 times [2022-03-15 16:49:44,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:49:44,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576467707] [2022-03-15 16:49:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:49:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:49:44,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:49:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:44,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:49:44,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576467707] [2022-03-15 16:49:44,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576467707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:49:44,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949551586] [2022-03-15 16:49:44,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 16:49:44,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:49:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:49:44,596 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:49:44,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 16:49:44,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 16:49:44,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:49:44,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:49:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:49:44,940 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:44,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2022-03-15 16:49:44,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:44,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 61 [2022-03-15 16:49:45,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:45,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:49:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:45,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:45,645 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:45,645 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 34 treesize of output 61 [2022-03-15 16:49:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:45,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:45,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:49:45,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 51 [2022-03-15 16:49:45,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:45,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 19 [2022-03-15 16:49:45,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:49:45,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2022-03-15 16:49:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:49:45,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949551586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:49:45,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:49:45,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-03-15 16:49:45,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361145847] [2022-03-15 16:49:45,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:49:45,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 16:49:45,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:49:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 16:49:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 16:49:45,890 INFO L87 Difference]: Start difference. First operand 7518 states and 26055 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2022-03-15 16:50:14,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:14,688 INFO L93 Difference]: Finished difference Result 16334 states and 53312 transitions. [2022-03-15 16:50:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2022-03-15 16:50:14,688 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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 30 [2022-03-15 16:50:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:14,720 INFO L225 Difference]: With dead ends: 16334 [2022-03-15 16:50:14,720 INFO L226 Difference]: Without dead ends: 16220 [2022-03-15 16:50:14,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44116 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=11557, Invalid=89249, Unknown=0, NotChecked=0, Total=100806 [2022-03-15 16:50:14,724 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1104 mSDsluCounter, 2543 mSDsCounter, 0 mSdLazyCounter, 5135 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 1456 SdHoareTripleChecker+Invalid, 8335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 5135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2683 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:14,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1104 Valid, 1456 Invalid, 8335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 5135 Invalid, 0 Unknown, 2683 Unchecked, 3.1s Time] [2022-03-15 16:50:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16220 states. [2022-03-15 16:50:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16220 to 7505. [2022-03-15 16:50:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7505 states, 7504 states have (on average 3.463219616204691) internal successors, (25988), 7504 states have internal predecessors, (25988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:14,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7505 states to 7505 states and 25988 transitions. [2022-03-15 16:50:14,973 INFO L78 Accepts]: Start accepts. Automaton has 7505 states and 25988 transitions. Word has length 30 [2022-03-15 16:50:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:14,973 INFO L470 AbstractCegarLoop]: Abstraction has 7505 states and 25988 transitions. [2022-03-15 16:50:14,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2022-03-15 16:50:14,973 INFO L276 IsEmpty]: Start isEmpty. Operand 7505 states and 25988 transitions. [2022-03-15 16:50:14,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:50:14,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:14,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:14,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-15 16:50:15,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:15,185 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:15,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1362135974, now seen corresponding path program 51 times [2022-03-15 16:50:15,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:15,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239730205] [2022-03-15 16:50:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:15,504 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:15,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239730205] [2022-03-15 16:50:15,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239730205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:15,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754407543] [2022-03-15 16:50:15,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 16:50:15,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:15,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:15,505 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:15,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 16:50:15,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 16:50:15,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 16:50:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:15,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:15,838 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 47 [2022-03-15 16:50:15,854 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:15,854 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 79 treesize of output 87 [2022-03-15 16:50:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:16,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:16,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:16,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 93 [2022-03-15 16:50:16,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:16,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 77 [2022-03-15 16:50:17,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:17,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754407543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:17,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:17,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2022-03-15 16:50:17,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055855068] [2022-03-15 16:50:17,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:17,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:50:17,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:17,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:50:17,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:50:17,692 INFO L87 Difference]: Start difference. First operand 7505 states and 25988 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:24,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:24,185 INFO L93 Difference]: Finished difference Result 16709 states and 56534 transitions. [2022-03-15 16:50:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-03-15 16:50:24,185 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 30 [2022-03-15 16:50:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:24,219 INFO L225 Difference]: With dead ends: 16709 [2022-03-15 16:50:24,219 INFO L226 Difference]: Without dead ends: 16630 [2022-03-15 16:50:24,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7115 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2654, Invalid=14902, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 16:50:24,220 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 622 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1159 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:24,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [622 Valid, 404 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 1642 Invalid, 0 Unknown, 1159 Unchecked, 1.0s Time] [2022-03-15 16:50:24,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2022-03-15 16:50:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 7559. [2022-03-15 16:50:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7559 states, 7558 states have (on average 3.463614712887007) internal successors, (26178), 7558 states have internal predecessors, (26178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7559 states to 7559 states and 26178 transitions. [2022-03-15 16:50:24,406 INFO L78 Accepts]: Start accepts. Automaton has 7559 states and 26178 transitions. Word has length 30 [2022-03-15 16:50:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:24,406 INFO L470 AbstractCegarLoop]: Abstraction has 7559 states and 26178 transitions. [2022-03-15 16:50:24,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 7559 states and 26178 transitions. [2022-03-15 16:50:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:50:24,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:24,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:24,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 16:50:24,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:24,617 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:24,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1538721804, now seen corresponding path program 52 times [2022-03-15 16:50:24,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:24,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978343659] [2022-03-15 16:50:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:24,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:24,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978343659] [2022-03-15 16:50:24,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978343659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:24,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658461850] [2022-03-15 16:50:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 16:50:24,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:24,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:24,944 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:24,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 16:50:24,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 16:50:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:24,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:50:24,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:25,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:25,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:25,256 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 31 [2022-03-15 16:50:25,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:25,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:25,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 26 [2022-03-15 16:50:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:25,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:25,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:25,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:25,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 68 [2022-03-15 16:50:25,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:25,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:25,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 58 [2022-03-15 16:50:25,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:25,999 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:25,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 61 [2022-03-15 16:50:26,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:26,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:26,018 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 24 treesize of output 51 [2022-03-15 16:50:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:26,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658461850] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:26,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:26,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 31 [2022-03-15 16:50:26,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371851488] [2022-03-15 16:50:26,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:26,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:50:26,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:50:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:50:26,266 INFO L87 Difference]: Start difference. First operand 7559 states and 26178 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:32,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:32,367 INFO L93 Difference]: Finished difference Result 13585 states and 43889 transitions. [2022-03-15 16:50:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-15 16:50:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 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 30 [2022-03-15 16:50:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:32,401 INFO L225 Difference]: With dead ends: 13585 [2022-03-15 16:50:32,401 INFO L226 Difference]: Without dead ends: 13507 [2022-03-15 16:50:32,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5084 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2156, Invalid=11416, Unknown=0, NotChecked=0, Total=13572 [2022-03-15 16:50:32,402 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 506 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 2824 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 3553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 2824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:32,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 687 Invalid, 3553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 2824 Invalid, 0 Unknown, 506 Unchecked, 1.6s Time] [2022-03-15 16:50:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13507 states. [2022-03-15 16:50:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13507 to 7582. [2022-03-15 16:50:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 3.4618124258013454) internal successors, (26244), 7581 states have internal predecessors, (26244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 26244 transitions. [2022-03-15 16:50:32,578 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 26244 transitions. Word has length 30 [2022-03-15 16:50:32,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:32,578 INFO L470 AbstractCegarLoop]: Abstraction has 7582 states and 26244 transitions. [2022-03-15 16:50:32,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:32,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 26244 transitions. [2022-03-15 16:50:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:50:32,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:32,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:32,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-15 16:50:32,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-15 16:50:32,790 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash 983099671, now seen corresponding path program 47 times [2022-03-15 16:50:32,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:32,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700192988] [2022-03-15 16:50:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:32,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:33,187 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:33,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:33,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700192988] [2022-03-15 16:50:33,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700192988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:33,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373891113] [2022-03-15 16:50:33,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 16:50:33,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:33,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:33,188 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:33,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 16:50:33,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 16:50:33,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:33,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:50:33,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 25 [2022-03-15 16:50:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 3 [2022-03-15 16:50:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:33,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:33,864 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:50:33,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:50:33,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,881 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:33,881 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 26 treesize of output 55 [2022-03-15 16:50:33,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:33,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:50:33,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:33,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:33,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:50:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:34,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373891113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:34,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:34,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-15 16:50:34,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430979900] [2022-03-15 16:50:34,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:34,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:50:34,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:50:34,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:50:34,048 INFO L87 Difference]: Start difference. First operand 7582 states and 26244 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:42,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:42,543 INFO L93 Difference]: Finished difference Result 11688 states and 38988 transitions. [2022-03-15 16:50:42,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-03-15 16:50:42,543 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 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 30 [2022-03-15 16:50:42,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:42,566 INFO L225 Difference]: With dead ends: 11688 [2022-03-15 16:50:42,567 INFO L226 Difference]: Without dead ends: 11594 [2022-03-15 16:50:42,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8229 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2731, Invalid=19025, Unknown=0, NotChecked=0, Total=21756 [2022-03-15 16:50:42,568 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 472 mSDsluCounter, 1452 mSDsCounter, 0 mSdLazyCounter, 3832 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 4231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 3832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:42,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 740 Invalid, 4231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 3832 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-15 16:50:42,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11594 states. [2022-03-15 16:50:42,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11594 to 7602. [2022-03-15 16:50:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7602 states, 7601 states have (on average 3.4592816734640177) internal successors, (26294), 7601 states have internal predecessors, (26294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:42,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7602 states to 7602 states and 26294 transitions. [2022-03-15 16:50:42,718 INFO L78 Accepts]: Start accepts. Automaton has 7602 states and 26294 transitions. Word has length 30 [2022-03-15 16:50:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:42,718 INFO L470 AbstractCegarLoop]: Abstraction has 7602 states and 26294 transitions. [2022-03-15 16:50:42,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 7602 states and 26294 transitions. [2022-03-15 16:50:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:50:42,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:42,730 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:42,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 16:50:42,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:42,930 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:42,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:42,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2041248553, now seen corresponding path program 48 times [2022-03-15 16:50:42,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:42,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160343088] [2022-03-15 16:50:42,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:42,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:43,368 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:43,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160343088] [2022-03-15 16:50:43,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160343088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:43,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128533974] [2022-03-15 16:50:43,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 16:50:43,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:43,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:43,369 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:43,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 16:50:43,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 16:50:43,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 16:50:43,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:50:43,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:43,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:43,709 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:43,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 66 [2022-03-15 16:50:43,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:43,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:43,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:43,732 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:43,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 117 [2022-03-15 16:50:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:43,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:44,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:44,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 57 [2022-03-15 16:50:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:44,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 45 [2022-03-15 16:50:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:44,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:50:44,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:44,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:44,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:50:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:44,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128533974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:44,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:44,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-03-15 16:50:44,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788491563] [2022-03-15 16:50:44,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:44,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 16:50:44,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:44,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 16:50:44,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 16:50:44,345 INFO L87 Difference]: Start difference. First operand 7602 states and 26294 transitions. Second operand has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 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) [2022-03-15 16:50:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 16:50:53,048 INFO L93 Difference]: Finished difference Result 13282 states and 44055 transitions. [2022-03-15 16:50:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-15 16:50:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 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 30 [2022-03-15 16:50:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 16:50:53,075 INFO L225 Difference]: With dead ends: 13282 [2022-03-15 16:50:53,075 INFO L226 Difference]: Without dead ends: 13167 [2022-03-15 16:50:53,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9094 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3232, Invalid=22850, Unknown=0, NotChecked=0, Total=26082 [2022-03-15 16:50:53,076 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 773 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 4961 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 5692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 4961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:50:53,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1173 Invalid, 5692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 4961 Invalid, 0 Unknown, 433 Unchecked, 2.5s Time] [2022-03-15 16:50:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13167 states. [2022-03-15 16:50:53,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13167 to 7713. [2022-03-15 16:50:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7713 states, 7712 states have (on average 3.454616182572614) internal successors, (26642), 7712 states have internal predecessors, (26642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 16:50:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7713 states to 7713 states and 26642 transitions. [2022-03-15 16:50:53,246 INFO L78 Accepts]: Start accepts. Automaton has 7713 states and 26642 transitions. Word has length 30 [2022-03-15 16:50:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 16:50:53,246 INFO L470 AbstractCegarLoop]: Abstraction has 7713 states and 26642 transitions. [2022-03-15 16:50:53,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 34 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) [2022-03-15 16:50:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7713 states and 26642 transitions. [2022-03-15 16:50:53,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 16:50:53,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 16:50:53,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 16:50:53,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-15 16:50:53,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 16:50:53,460 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 16:50:53,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 16:50:53,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2118966875, now seen corresponding path program 49 times [2022-03-15 16:50:53,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 16:50:53,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408831496] [2022-03-15 16:50:53,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 16:50:53,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 16:50:53,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:53,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 16:50:53,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408831496] [2022-03-15 16:50:53,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408831496] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 16:50:53,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626294088] [2022-03-15 16:50:53,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 16:50:53,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 16:50:53,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 16:50:53,844 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 16:50:53,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 16:50:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 16:50:53,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 16:50:53,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 16:50:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:54,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2022-03-15 16:50:54,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:54,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-15 16:50:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:54,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 16:50:54,573 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 16:50:54,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 63 [2022-03-15 16:50:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 16:50:54,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 55 [2022-03-15 16:50:54,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:54,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-15 16:50:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 16:50:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 16:50:54,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-03-15 16:50:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 16:50:54,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626294088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 16:50:54,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 16:50:54,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-03-15 16:50:54,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433348566] [2022-03-15 16:50:54,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-15 16:50:54,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 16:50:54,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 16:50:54,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 16:50:54,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-15 16:50:54,782 INFO L87 Difference]: Start difference. First operand 7713 states and 26642 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) Received shutdown request... [2022-03-15 16:51:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-15 16:51:03,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9369 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3637, Invalid=20855, Unknown=0, NotChecked=0, Total=24492 [2022-03-15 16:51:03,913 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 450 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 2828 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 3252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 2828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-15 16:51:03,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 360 Invalid, 3252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 2828 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-15 16:51:03,914 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 16:51:03,915 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:51:03,926 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 16:51:03,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 16:51:04,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 16:51:04,115 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 135 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 157 known predicates. [2022-03-15 16:51:04,116 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 16:51:04,116 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 16:51:04,116 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 16:51:04,118 INFO L732 BasicCegarLoop]: Path program histogram: [52, 49, 1, 1, 1] [2022-03-15 16:51:04,120 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 16:51:04,120 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 16:51:04,121 INFO L202 PluginConnector]: Adding new model array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 04:51:04 BasicIcfg [2022-03-15 16:51:04,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 16:51:04,122 INFO L158 Benchmark]: Toolchain (without parser) took 724715.66ms. Allocated memory was 182.5MB in the beginning and 889.2MB in the end (delta: 706.7MB). Free memory was 141.0MB in the beginning and 355.0MB in the end (delta: -214.0MB). Peak memory consumption was 494.8MB. Max. memory is 8.0GB. [2022-03-15 16:51:04,122 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 182.5MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:51:04,122 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.75ms. Allocated memory is still 182.5MB. Free memory was 140.9MB in the beginning and 139.3MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 16:51:04,122 INFO L158 Benchmark]: Boogie Preprocessor took 21.99ms. Allocated memory is still 182.5MB. Free memory was 139.3MB in the beginning and 138.4MB in the end (delta: 918.7kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 16:51:04,122 INFO L158 Benchmark]: RCFGBuilder took 220.32ms. Allocated memory is still 182.5MB. Free memory was 138.3MB in the beginning and 129.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 16:51:04,122 INFO L158 Benchmark]: TraceAbstraction took 724440.85ms. Allocated memory was 182.5MB in the beginning and 889.2MB in the end (delta: 706.7MB). Free memory was 128.8MB in the beginning and 355.0MB in the end (delta: -226.2MB). Peak memory consumption was 481.2MB. Max. memory is 8.0GB. [2022-03-15 16:51:04,122 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 0.12ms. Allocated memory is still 182.5MB. Free memory is still 142.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.75ms. Allocated memory is still 182.5MB. Free memory was 140.9MB in the beginning and 139.3MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.99ms. Allocated memory is still 182.5MB. Free memory was 139.3MB in the beginning and 138.4MB in the end (delta: 918.7kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 220.32ms. Allocated memory is still 182.5MB. Free memory was 138.3MB in the beginning and 129.3MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 724440.85ms. Allocated memory was 182.5MB in the beginning and 889.2MB in the end (delta: 706.7MB). Free memory was 128.8MB in the beginning and 355.0MB in the end (delta: -226.2MB). Peak memory consumption was 481.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 135 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 157 known predicates. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 135 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 157 known predicates. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 135 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 157 known predicates. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (7713states) and FLOYD_HOARE automaton (currently 135 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 157 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 724.3s, OverallIterations: 104, TraceHistogramMax: 2, PathProgramHistogramMax: 52, EmptinessCheckTime: 0.7s, AutomataDifference: 567.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 55526 SdHoareTripleChecker+Valid, 116.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55526 mSDsluCounter, 50719 SdHoareTripleChecker+Invalid, 99.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31772 IncrementalHoareTripleChecker+Unchecked, 89834 mSDsCounter, 20849 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 214469 IncrementalHoareTripleChecker+Invalid, 267090 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20849 mSolverCounterUnsat, 3467 mSDtfsCounter, 214469 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14969 GetRequests, 4342 SyntacticMatches, 389 SemanticMatches, 10237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 672614 ImplicationChecksByTransitivity, 477.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7713occurred in iteration=103, InterpolantAutomatonStates: 8467, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 10.6s AutomataMinimizationTime, 103 MinimizatonAttempts, 450803 StatesRemovedByMinimization, 103 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 120.7s InterpolantComputationTime, 5868 NumberOfCodeBlocks, 5853 NumberOfCodeBlocksAsserted, 321 NumberOfCheckSat, 8466 ConstructedInterpolants, 228 QuantifiedInterpolants, 166326 SizeOfPredicates, 1396 NumberOfNonLiveVariables, 6426 ConjunctsInSsa, 1987 ConjunctsInUnsatCore, 306 InterpolantComputations, 3 PerfectInterpolantSequences, 216/2060 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