/usr/bin/java -Xmx16000000000 -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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-max.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 16:26:43,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 16:26:43,146 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 16:26:43,198 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 16:26:43,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-18 16:26:43,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-18 16:26:43,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-18 16:26:43,248 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-Separate.epf [2022-01-18 16:26:43,272 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 16:26:43,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 16:26:43,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 16:26:43,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 16:26:43,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 16:26:43,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 16:26:43,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 16:26:43,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 16:26:43,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 16:26:43,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:26:43,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 16:26:43,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 16:26:43,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 16:26:43,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 16:26:43,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 16:26:43,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 16:26:43,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 16:26:43,276 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 16:26:43,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 16:26:43,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 16:26:43,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 16:26:43,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 16:26:43,496 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 16:26:43,497 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 16:26:43,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-max.wvr.bpl [2022-01-18 16:26:43,498 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/three-array-max.wvr.bpl' [2022-01-18 16:26:43,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 16:26:43,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 16:26:43,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 16:26:43,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 16:26:43,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 16:26:43,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,547 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 16:26:43,548 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 16:26:43,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 16:26:43,549 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 16:26:43,549 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 16:26:43,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,568 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 16:26:43,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 16:26:43,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 16:26:43,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 16:26:43,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/1) ... [2022-01-18 16:26:43,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 16:26:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:43,599 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) [2022-01-18 16:26:43,603 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 [2022-01-18 16:26:43,627 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 16:26:43,627 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 16:26:43,627 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 16:26:43,628 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 16:26:43,628 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 16:26:43,628 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 16:26:43,628 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 16:26:43,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 16:26:43,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 16:26:43,628 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 16:26:43,629 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 16:26:43,629 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 16:26:43,630 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 16:26:43,670 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 16:26:43,672 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 16:26:43,769 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 16:26:43,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 16:26:43,781 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 16:26:43,782 INFO L202 PluginConnector]: Adding new model three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:26:43 BoogieIcfgContainer [2022-01-18 16:26:43,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 16:26:43,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 16:26:43,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 16:26:43,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 16:26:43,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 04:26:43" (1/2) ... [2022-01-18 16:26:43,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644ebc2f and model type three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 04:26:43, skipping insertion in model container [2022-01-18 16:26:43,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 04:26:43" (2/2) ... [2022-01-18 16:26:43,797 INFO L111 eAbstractionObserver]: Analyzing ICFG three-array-max.wvr.bpl [2022-01-18 16:26:43,800 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 16:26:43,800 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 16:26:43,800 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 16:26:43,801 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 16:26:43,844 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 16:26:43,875 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 16:26:43,879 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, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 16:26:43,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 16:26:43,885 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 32 transitions, 88 flow [2022-01-18 16:26:43,920 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:43,922 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:43,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 16:26:43,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:43,929 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:43,929 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:43,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1053276962, now seen corresponding path program 1 times [2022-01-18 16:26:43,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:43,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44333339] [2022-01-18 16:26:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:43,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:44,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44333339] [2022-01-18 16:26:44,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44333339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:26:44,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:26:44,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 16:26:44,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877337484] [2022-01-18 16:26:44,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 16:26:44,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 16:26:44,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:26:44,094 INFO L87 Difference]: Start difference. First operand has 134 states, 133 states have (on average 2.9774436090225564) internal successors, (396), 133 states have internal predecessors, (396), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:44,200 INFO L93 Difference]: Finished difference Result 474 states and 1450 transitions. [2022-01-18 16:26:44,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:26:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 16:26:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:44,212 INFO L225 Difference]: With dead ends: 474 [2022-01-18 16:26:44,212 INFO L226 Difference]: Without dead ends: 388 [2022-01-18 16:26:44,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:44,216 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:44,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-18 16:26:44,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 176. [2022-01-18 16:26:44,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 3.0914285714285716) internal successors, (541), 175 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 541 transitions. [2022-01-18 16:26:44,297 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 541 transitions. Word has length 19 [2022-01-18 16:26:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:44,298 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 541 transitions. [2022-01-18 16:26:44,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,298 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 541 transitions. [2022-01-18 16:26:44,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:26:44,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:44,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:44,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 16:26:44,300 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:44,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -324392928, now seen corresponding path program 1 times [2022-01-18 16:26:44,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:44,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022615515] [2022-01-18 16:26:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:44,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022615515] [2022-01-18 16:26:44,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022615515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:26:44,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:26:44,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:26:44,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771017214] [2022-01-18 16:26:44,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:26:44,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:26:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:26:44,361 INFO L87 Difference]: Start difference. First operand 176 states and 541 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:44,448 INFO L93 Difference]: Finished difference Result 272 states and 825 transitions. [2022-01-18 16:26:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:26:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:26:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:44,453 INFO L225 Difference]: With dead ends: 272 [2022-01-18 16:26:44,453 INFO L226 Difference]: Without dead ends: 249 [2022-01-18 16:26:44,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:26:44,459 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 27 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:44,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:44,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-18 16:26:44,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 232. [2022-01-18 16:26:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 3.051948051948052) internal successors, (705), 231 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 705 transitions. [2022-01-18 16:26:44,478 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 705 transitions. Word has length 22 [2022-01-18 16:26:44,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:44,478 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 705 transitions. [2022-01-18 16:26:44,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,478 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 705 transitions. [2022-01-18 16:26:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:26:44,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:44,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:44,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 16:26:44,482 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash -2144032734, now seen corresponding path program 2 times [2022-01-18 16:26:44,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:44,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332051957] [2022-01-18 16:26:44,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:44,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:44,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332051957] [2022-01-18 16:26:44,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332051957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:26:44,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:26:44,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:26:44,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902305408] [2022-01-18 16:26:44,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:26:44,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:26:44,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:26:44,523 INFO L87 Difference]: Start difference. First operand 232 states and 705 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:44,580 INFO L93 Difference]: Finished difference Result 371 states and 1117 transitions. [2022-01-18 16:26:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 16:26:44,580 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:26:44,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:44,583 INFO L225 Difference]: With dead ends: 371 [2022-01-18 16:26:44,583 INFO L226 Difference]: Without dead ends: 348 [2022-01-18 16:26:44,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 16:26:44,585 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:44,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:26:44,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-18 16:26:44,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 267. [2022-01-18 16:26:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 3.1203007518796992) internal successors, (830), 266 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 830 transitions. [2022-01-18 16:26:44,600 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 830 transitions. Word has length 22 [2022-01-18 16:26:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:44,601 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 830 transitions. [2022-01-18 16:26:44,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 830 transitions. [2022-01-18 16:26:44,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 16:26:44,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:44,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:44,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 16:26:44,602 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:44,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:44,603 INFO L85 PathProgramCache]: Analyzing trace with hash -698997086, now seen corresponding path program 3 times [2022-01-18 16:26:44,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646786243] [2022-01-18 16:26:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:44,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646786243] [2022-01-18 16:26:44,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646786243] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:26:44,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:26:44,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:26:44,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400804640] [2022-01-18 16:26:44,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:26:44,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:26:44,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:26:44,649 INFO L87 Difference]: Start difference. First operand 267 states and 830 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:44,675 INFO L93 Difference]: Finished difference Result 301 states and 881 transitions. [2022-01-18 16:26:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:26:44,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 16:26:44,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:44,677 INFO L225 Difference]: With dead ends: 301 [2022-01-18 16:26:44,677 INFO L226 Difference]: Without dead ends: 279 [2022-01-18 16:26:44,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:26:44,682 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:44,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:26:44,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-18 16:26:44,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 272. [2022-01-18 16:26:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 3.022140221402214) internal successors, (819), 271 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 819 transitions. [2022-01-18 16:26:44,696 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 819 transitions. Word has length 22 [2022-01-18 16:26:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:44,696 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 819 transitions. [2022-01-18 16:26:44,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:44,696 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 819 transitions. [2022-01-18 16:26:44,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:26:44,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:44,697 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] [2022-01-18 16:26:44,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 16:26:44,698 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:44,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:44,698 INFO L85 PathProgramCache]: Analyzing trace with hash 665668420, now seen corresponding path program 1 times [2022-01-18 16:26:44,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:44,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723338340] [2022-01-18 16:26:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:44,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,734 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:44,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723338340] [2022-01-18 16:26:44,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723338340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:44,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74199467] [2022-01-18 16:26:44,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:44,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:44,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:44,737 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) [2022-01-18 16:26:44,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 16:26:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:44,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-18 16:26:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:44,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74199467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:44,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:44,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-01-18 16:26:44,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234518971] [2022-01-18 16:26:44,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:44,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:26:44,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:26:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:44,951 INFO L87 Difference]: Start difference. First operand 272 states and 819 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:45,024 INFO L93 Difference]: Finished difference Result 360 states and 1056 transitions. [2022-01-18 16:26:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:26:45,024 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 16:26:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:45,026 INFO L225 Difference]: With dead ends: 360 [2022-01-18 16:26:45,026 INFO L226 Difference]: Without dead ends: 360 [2022-01-18 16:26:45,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:26:45,028 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:45,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-18 16:26:45,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 288. [2022-01-18 16:26:45,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 3.0034843205574915) internal successors, (862), 287 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 862 transitions. [2022-01-18 16:26:45,039 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 862 transitions. Word has length 24 [2022-01-18 16:26:45,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:45,039 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 862 transitions. [2022-01-18 16:26:45,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 862 transitions. [2022-01-18 16:26:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 16:26:45,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:45,043 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] [2022-01-18 16:26:45,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 16:26:45,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:45,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:45,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash 55281188, now seen corresponding path program 2 times [2022-01-18 16:26:45,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:45,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682950064] [2022-01-18 16:26:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:45,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:45,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:45,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682950064] [2022-01-18 16:26:45,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682950064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 16:26:45,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 16:26:45,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 16:26:45,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336416797] [2022-01-18 16:26:45,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 16:26:45,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 16:26:45,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:45,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 16:26:45,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:26:45,316 INFO L87 Difference]: Start difference. First operand 288 states and 862 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:45,350 INFO L93 Difference]: Finished difference Result 276 states and 851 transitions. [2022-01-18 16:26:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 16:26:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have 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 [2022-01-18 16:26:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:45,352 INFO L225 Difference]: With dead ends: 276 [2022-01-18 16:26:45,352 INFO L226 Difference]: Without dead ends: 276 [2022-01-18 16:26:45,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 16:26:45,353 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:45,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 30 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:26:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-18 16:26:45,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 243. [2022-01-18 16:26:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 3.0950413223140494) internal successors, (749), 242 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 749 transitions. [2022-01-18 16:26:45,361 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 749 transitions. Word has length 24 [2022-01-18 16:26:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:45,361 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 749 transitions. [2022-01-18 16:26:45,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 749 transitions. [2022-01-18 16:26:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:26:45,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:45,362 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] [2022-01-18 16:26:45,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 16:26:45,362 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash 109515422, now seen corresponding path program 1 times [2022-01-18 16:26:45,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:45,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905111367] [2022-01-18 16:26:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:45,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:45,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:45,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905111367] [2022-01-18 16:26:45,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905111367] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:45,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110540101] [2022-01-18 16:26:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:45,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:45,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:45,799 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) [2022-01-18 16:26:45,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 16:26:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:45,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:26:45,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:46,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2022-01-18 16:26:46,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2022-01-18 16:26:46,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 16:26:46,435 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 50 treesize of output 38 [2022-01-18 16:26:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:46,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:46,552 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 91 treesize of output 85 [2022-01-18 16:26:47,227 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 16:26:47,228 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 23 treesize of output 34 [2022-01-18 16:26:47,265 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-18 16:26:47,265 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 24 treesize of output 1 [2022-01-18 16:26:47,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:47,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-18 16:26:47,280 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 16:26:47,280 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 1 [2022-01-18 16:26:47,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:47,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-18 16:26:47,293 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 16:26:47,294 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 23 treesize of output 1 [2022-01-18 16:26:47,311 INFO L353 Elim1Store]: treesize reduction 10, result has 60.0 percent of original size [2022-01-18 16:26:47,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 27 [2022-01-18 16:26:47,329 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-18 16:26:47,330 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 22 treesize of output 1 [2022-01-18 16:26:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:47,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110540101] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:47,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:47,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 16:26:47,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255623216] [2022-01-18 16:26:47,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:47,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:26:47,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:47,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:26:47,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:26:47,389 INFO L87 Difference]: Start difference. First operand 243 states and 749 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:47,653 INFO L93 Difference]: Finished difference Result 471 states and 1460 transitions. [2022-01-18 16:26:47,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 16:26:47,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:26:47,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:47,656 INFO L225 Difference]: With dead ends: 471 [2022-01-18 16:26:47,656 INFO L226 Difference]: Without dead ends: 428 [2022-01-18 16:26:47,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:26:47,657 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:47,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 113 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:26:47,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-01-18 16:26:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 329. [2022-01-18 16:26:47,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 3.1219512195121952) internal successors, (1024), 328 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 1024 transitions. [2022-01-18 16:26:47,664 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 1024 transitions. Word has length 26 [2022-01-18 16:26:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:47,665 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 1024 transitions. [2022-01-18 16:26:47,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:47,665 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 1024 transitions. [2022-01-18 16:26:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:26:47,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:47,666 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] [2022-01-18 16:26:47,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:47,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-01-18 16:26:47,875 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:47,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1564312640, now seen corresponding path program 2 times [2022-01-18 16:26:47,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:47,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034786161] [2022-01-18 16:26:47,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:47,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034786161] [2022-01-18 16:26:48,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034786161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199087157] [2022-01-18 16:26:48,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:48,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:48,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:48,054 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) [2022-01-18 16:26:48,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 16:26:48,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:48,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:48,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:26:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:48,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:26:48,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2022-01-18 16:26:48,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2022-01-18 16:26:48,418 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 50 treesize of output 38 [2022-01-18 16:26:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:48,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:48,775 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 32 treesize of output 30 [2022-01-18 16:26:48,789 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 36 treesize of output 34 [2022-01-18 16:26:48,803 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 32 treesize of output 30 [2022-01-18 16:26:48,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-18 16:26:49,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:49,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-18 16:26:49,310 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 16:26:49,311 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 1 [2022-01-18 16:26:49,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:49,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-18 16:26:49,322 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 16:26:49,322 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 23 treesize of output 1 [2022-01-18 16:26:49,343 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 16:26:49,343 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 28 treesize of output 39 [2022-01-18 16:26:49,399 INFO L353 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-01-18 16:26:49,399 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 27 treesize of output 39 [2022-01-18 16:26:49,434 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:49,435 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 25 treesize of output 41 [2022-01-18 16:26:49,475 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-18 16:26:49,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 1 [2022-01-18 16:26:49,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:49,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199087157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:49,534 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:49,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-01-18 16:26:49,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735504296] [2022-01-18 16:26:49,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:49,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 16:26:49,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:49,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 16:26:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-18 16:26:49,535 INFO L87 Difference]: Start difference. First operand 329 states and 1024 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2022-01-18 16:26:49,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:49,911 INFO L93 Difference]: Finished difference Result 655 states and 2075 transitions. [2022-01-18 16:26:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:26:49,912 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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 26 [2022-01-18 16:26:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:49,915 INFO L225 Difference]: With dead ends: 655 [2022-01-18 16:26:49,915 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 16:26:49,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2022-01-18 16:26:49,915 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:49,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 122 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:26:49,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 16:26:49,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 349. [2022-01-18 16:26:49,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1264367816091956) internal successors, (1088), 348 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:49,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1088 transitions. [2022-01-18 16:26:49,924 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1088 transitions. Word has length 26 [2022-01-18 16:26:49,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:49,924 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1088 transitions. [2022-01-18 16:26:49,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 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) [2022-01-18 16:26:49,924 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1088 transitions. [2022-01-18 16:26:49,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 16:26:49,925 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:49,925 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] [2022-01-18 16:26:49,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:50,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:50,156 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:50,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:50,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1161623412, now seen corresponding path program 3 times [2022-01-18 16:26:50,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:50,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011208597] [2022-01-18 16:26:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:50,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:50,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011208597] [2022-01-18 16:26:50,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011208597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:50,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199124259] [2022-01-18 16:26:50,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:50,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:50,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:50,346 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) [2022-01-18 16:26:50,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 16:26:50,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:26:50,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:50,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 16:26:50,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:50,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:26:50,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-01-18 16:26:50,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 32 [2022-01-18 16:26:50,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2022-01-18 16:26:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:50,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:51,293 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 32 treesize of output 30 [2022-01-18 16:26:51,310 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 26 [2022-01-18 16:26:51,326 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 32 treesize of output 30 [2022-01-18 16:26:51,340 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 36 treesize of output 34 [2022-01-18 16:26:51,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:51,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-18 16:26:51,844 INFO L353 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-01-18 16:26:51,845 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 28 treesize of output 39 [2022-01-18 16:26:51,901 INFO L353 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-01-18 16:26:51,901 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 27 treesize of output 39 [2022-01-18 16:26:51,943 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 16:26:51,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 1 [2022-01-18 16:26:51,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:26:51,960 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 25 treesize of output 41 [2022-01-18 16:26:52,018 INFO L353 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-01-18 16:26:52,018 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 26 treesize of output 1 [2022-01-18 16:26:52,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:26:52,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-01-18 16:26:52,035 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-01-18 16:26:52,035 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 1 [2022-01-18 16:26:52,090 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:26:52,091 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 8 treesize of output 8 [2022-01-18 16:26:52,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:26:52,098 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 7 treesize of output 1 [2022-01-18 16:26:52,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:52,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199124259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:52,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:52,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2022-01-18 16:26:52,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836540830] [2022-01-18 16:26:52,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:52,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 16:26:52,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:52,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 16:26:52,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-01-18 16:26:52,121 INFO L87 Difference]: Start difference. First operand 349 states and 1088 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:52,453 INFO L93 Difference]: Finished difference Result 558 states and 1755 transitions. [2022-01-18 16:26:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 16:26:52,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 16:26:52,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:52,456 INFO L225 Difference]: With dead ends: 558 [2022-01-18 16:26:52,457 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 16:26:52,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-01-18 16:26:52,457 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 194 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:52,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 95 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:26:52,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 16:26:52,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 349. [2022-01-18 16:26:52,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 3.1436781609195403) internal successors, (1094), 348 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 1094 transitions. [2022-01-18 16:26:52,466 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 1094 transitions. Word has length 26 [2022-01-18 16:26:52,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:52,467 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 1094 transitions. [2022-01-18 16:26:52,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,467 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 1094 transitions. [2022-01-18 16:26:52,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:26:52,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:52,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:52,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:52,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:52,679 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -709205764, now seen corresponding path program 4 times [2022-01-18 16:26:52,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:52,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88994347] [2022-01-18 16:26:52,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:52,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:52,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:52,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:52,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88994347] [2022-01-18 16:26:52,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88994347] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:52,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243337750] [2022-01-18 16:26:52,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:52,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:52,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:52,709 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) [2022-01-18 16:26:52,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 16:26:52,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:52,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:52,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:52,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:52,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:52,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:52,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243337750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:52,826 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:52,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:26:52,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228447421] [2022-01-18 16:26:52,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:52,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:26:52,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:26:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:26:52,828 INFO L87 Difference]: Start difference. First operand 349 states and 1094 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:52,922 INFO L93 Difference]: Finished difference Result 871 states and 2716 transitions. [2022-01-18 16:26:52,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:26:52,922 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 16:26:52,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:52,926 INFO L225 Difference]: With dead ends: 871 [2022-01-18 16:26:52,926 INFO L226 Difference]: Without dead ends: 871 [2022-01-18 16:26:52,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:26:52,927 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:52,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 81 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:52,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-01-18 16:26:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 579. [2022-01-18 16:26:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 578 states have (on average 3.330449826989619) internal successors, (1925), 578 states have internal predecessors, (1925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 1925 transitions. [2022-01-18 16:26:52,940 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 1925 transitions. Word has length 28 [2022-01-18 16:26:52,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:52,940 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 1925 transitions. [2022-01-18 16:26:52,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:52,940 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 1925 transitions. [2022-01-18 16:26:52,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:26:52,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:52,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:52,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:53,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 16:26:53,157 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:53,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1896545024, now seen corresponding path program 5 times [2022-01-18 16:26:53,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:53,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174976787] [2022-01-18 16:26:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:53,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:53,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174976787] [2022-01-18 16:26:53,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174976787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:53,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570790548] [2022-01-18 16:26:53,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:53,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:53,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:53,189 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) [2022-01-18 16:26:53,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 16:26:53,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:26:53,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:53,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:53,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:53,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:53,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570790548] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:53,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:53,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:26:53,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672653506] [2022-01-18 16:26:53,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:53,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:26:53,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:26:53,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:53,297 INFO L87 Difference]: Start difference. First operand 579 states and 1925 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:53,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:53,373 INFO L93 Difference]: Finished difference Result 861 states and 2683 transitions. [2022-01-18 16:26:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:26:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-01-18 16:26:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:53,378 INFO L225 Difference]: With dead ends: 861 [2022-01-18 16:26:53,378 INFO L226 Difference]: Without dead ends: 861 [2022-01-18 16:26:53,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:26:53,378 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 95 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:53,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 59 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:53,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-01-18 16:26:53,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 575. [2022-01-18 16:26:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 3.308362369337979) internal successors, (1899), 574 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1899 transitions. [2022-01-18 16:26:53,394 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1899 transitions. Word has length 28 [2022-01-18 16:26:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:53,395 INFO L470 AbstractCegarLoop]: Abstraction has 575 states and 1899 transitions. [2022-01-18 16:26:53,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1899 transitions. [2022-01-18 16:26:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-18 16:26:53,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:53,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:53,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:53,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:53,611 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:53,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:53,612 INFO L85 PathProgramCache]: Analyzing trace with hash 454285246, now seen corresponding path program 6 times [2022-01-18 16:26:53,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:53,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099525095] [2022-01-18 16:26:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:53,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:53,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099525095] [2022-01-18 16:26:53,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099525095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:53,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367251854] [2022-01-18 16:26:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:53,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:53,643 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) [2022-01-18 16:26:53,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 16:26:53,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 16:26:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:53,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:26:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:53,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:53,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:53,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367251854] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:53,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:53,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-18 16:26:53,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380675275] [2022-01-18 16:26:53,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:53,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:26:53,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:26:53,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:26:53,749 INFO L87 Difference]: Start difference. First operand 575 states and 1899 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2022-01-18 16:26:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:54,247 INFO L93 Difference]: Finished difference Result 2153 states and 6965 transitions. [2022-01-18 16:26:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 16:26:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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 28 [2022-01-18 16:26:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:54,256 INFO L225 Difference]: With dead ends: 2153 [2022-01-18 16:26:54,256 INFO L226 Difference]: Without dead ends: 2153 [2022-01-18 16:26:54,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=324, Invalid=1008, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:26:54,257 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 265 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:54,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 152 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 16:26:54,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2153 states. [2022-01-18 16:26:54,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2153 to 741. [2022-01-18 16:26:54,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 741 states, 740 states have (on average 3.574324324324324) internal successors, (2645), 740 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 2645 transitions. [2022-01-18 16:26:54,282 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 2645 transitions. Word has length 28 [2022-01-18 16:26:54,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:54,282 INFO L470 AbstractCegarLoop]: Abstraction has 741 states and 2645 transitions. [2022-01-18 16:26:54,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 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) [2022-01-18 16:26:54,283 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 2645 transitions. [2022-01-18 16:26:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:26:54,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:54,285 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] [2022-01-18 16:26:54,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:54,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:54,494 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:54,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1068511452, now seen corresponding path program 7 times [2022-01-18 16:26:54,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:54,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092435926] [2022-01-18 16:26:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:54,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:54,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:54,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092435926] [2022-01-18 16:26:54,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092435926] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008341363] [2022-01-18 16:26:54,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:54,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:54,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:54,524 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) [2022-01-18 16:26:54,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 16:26:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:54,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:54,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:54,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:54,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008341363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:54,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:54,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:26:54,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060470143] [2022-01-18 16:26:54,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:54,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:26:54,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:54,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:26:54,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:26:54,663 INFO L87 Difference]: Start difference. First operand 741 states and 2645 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:54,771 INFO L93 Difference]: Finished difference Result 1909 states and 6809 transitions. [2022-01-18 16:26:54,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:26:54,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-18 16:26:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:54,781 INFO L225 Difference]: With dead ends: 1909 [2022-01-18 16:26:54,781 INFO L226 Difference]: Without dead ends: 1747 [2022-01-18 16:26:54,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:26:54,782 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:54,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 58 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:54,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-01-18 16:26:54,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1449. [2022-01-18 16:26:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 3.7327348066298343) internal successors, (5405), 1448 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 5405 transitions. [2022-01-18 16:26:54,810 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 5405 transitions. Word has length 29 [2022-01-18 16:26:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:54,810 INFO L470 AbstractCegarLoop]: Abstraction has 1449 states and 5405 transitions. [2022-01-18 16:26:54,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:54,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 5405 transitions. [2022-01-18 16:26:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:26:54,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:54,813 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] [2022-01-18 16:26:54,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:55,027 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,SelfDestructingSolverStorable12 [2022-01-18 16:26:55,027 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1671938888, now seen corresponding path program 8 times [2022-01-18 16:26:55,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:55,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088397558] [2022-01-18 16:26:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:55,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:55,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088397558] [2022-01-18 16:26:55,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088397558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:55,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657899141] [2022-01-18 16:26:55,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:26:55,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:55,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:55,067 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) [2022-01-18 16:26:55,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 16:26:55,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:26:55,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:55,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:55,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:55,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:55,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657899141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:55,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:55,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-01-18 16:26:55,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550692419] [2022-01-18 16:26:55,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:55,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 16:26:55,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:55,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 16:26:55,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 16:26:55,177 INFO L87 Difference]: Start difference. First operand 1449 states and 5405 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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) [2022-01-18 16:26:55,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:55,658 INFO L93 Difference]: Finished difference Result 3995 states and 14025 transitions. [2022-01-18 16:26:55,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 16:26:55,658 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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 29 [2022-01-18 16:26:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:55,675 INFO L225 Difference]: With dead ends: 3995 [2022-01-18 16:26:55,675 INFO L226 Difference]: Without dead ends: 3839 [2022-01-18 16:26:55,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 16:26:55,676 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 442 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:55,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 84 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:26:55,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3839 states. [2022-01-18 16:26:55,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3839 to 2530. [2022-01-18 16:26:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.837089758797944) internal successors, (9704), 2529 states have internal predecessors, (9704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:55,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9704 transitions. [2022-01-18 16:26:55,741 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9704 transitions. Word has length 29 [2022-01-18 16:26:55,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:55,741 INFO L470 AbstractCegarLoop]: Abstraction has 2530 states and 9704 transitions. [2022-01-18 16:26:55,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 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) [2022-01-18 16:26:55,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9704 transitions. [2022-01-18 16:26:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:26:55,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:55,747 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] [2022-01-18 16:26:55,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:55,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 16:26:55,959 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1406736764, now seen corresponding path program 9 times [2022-01-18 16:26:55,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:55,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207439048] [2022-01-18 16:26:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:55,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:55,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207439048] [2022-01-18 16:26:55,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207439048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:55,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567596677] [2022-01-18 16:26:55,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:26:55,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:55,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:55,986 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) [2022-01-18 16:26:55,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 16:26:56,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 16:26:56,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:56,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:56,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:56,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:56,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:56,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567596677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:56,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:56,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:26:56,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896140276] [2022-01-18 16:26:56,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:56,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:26:56,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:56,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:26:56,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:56,109 INFO L87 Difference]: Start difference. First operand 2530 states and 9704 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-01-18 16:26:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:56,201 INFO L93 Difference]: Finished difference Result 3602 states and 13510 transitions. [2022-01-18 16:26:56,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 16:26:56,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 29 [2022-01-18 16:26:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:56,226 INFO L225 Difference]: With dead ends: 3602 [2022-01-18 16:26:56,226 INFO L226 Difference]: Without dead ends: 3568 [2022-01-18 16:26:56,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:26:56,227 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 70 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:56,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 57 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:56,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3568 states. [2022-01-18 16:26:56,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3568 to 3231. [2022-01-18 16:26:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3231 states, 3230 states have (on average 3.8625386996904023) internal successors, (12476), 3230 states have internal predecessors, (12476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:56,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 12476 transitions. [2022-01-18 16:26:56,296 INFO L78 Accepts]: Start accepts. Automaton has 3231 states and 12476 transitions. Word has length 29 [2022-01-18 16:26:56,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:56,296 INFO L470 AbstractCegarLoop]: Abstraction has 3231 states and 12476 transitions. [2022-01-18 16:26:56,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-01-18 16:26:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3231 states and 12476 transitions. [2022-01-18 16:26:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:26:56,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:56,304 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] [2022-01-18 16:26:56,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:56,523 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,SelfDestructingSolverStorable14 [2022-01-18 16:26:56,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:56,524 INFO L85 PathProgramCache]: Analyzing trace with hash 466613648, now seen corresponding path program 10 times [2022-01-18 16:26:56,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:56,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066440855] [2022-01-18 16:26:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:56,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:56,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066440855] [2022-01-18 16:26:56,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066440855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:56,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51871339] [2022-01-18 16:26:56,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:26:56,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:56,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:56,549 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) [2022-01-18 16:26:56,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 16:26:56,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:26:56,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:56,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:56,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:56,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:56,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51871339] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:56,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:56,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:26:56,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916387636] [2022-01-18 16:26:56,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:56,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:26:56,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:56,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:26:56,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:26:56,653 INFO L87 Difference]: Start difference. First operand 3231 states and 12476 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-01-18 16:26:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:56,758 INFO L93 Difference]: Finished difference Result 3778 states and 14160 transitions. [2022-01-18 16:26:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:26:56,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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 29 [2022-01-18 16:26:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:56,767 INFO L225 Difference]: With dead ends: 3778 [2022-01-18 16:26:56,767 INFO L226 Difference]: Without dead ends: 3778 [2022-01-18 16:26:56,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:26:56,768 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:56,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 64 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3778 states. [2022-01-18 16:26:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3778 to 3280. [2022-01-18 16:26:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3280 states, 3279 states have (on average 3.868862458066484) internal successors, (12686), 3279 states have internal predecessors, (12686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:56,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3280 states to 3280 states and 12686 transitions. [2022-01-18 16:26:56,831 INFO L78 Accepts]: Start accepts. Automaton has 3280 states and 12686 transitions. Word has length 29 [2022-01-18 16:26:56,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:56,831 INFO L470 AbstractCegarLoop]: Abstraction has 3280 states and 12686 transitions. [2022-01-18 16:26:56,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 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) [2022-01-18 16:26:56,831 INFO L276 IsEmpty]: Start isEmpty. Operand 3280 states and 12686 transitions. [2022-01-18 16:26:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-18 16:26:56,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:56,838 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] [2022-01-18 16:26:56,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:57,047 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,SelfDestructingSolverStorable15 [2022-01-18 16:26:57,047 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:57,048 INFO L85 PathProgramCache]: Analyzing trace with hash -339625636, now seen corresponding path program 11 times [2022-01-18 16:26:57,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:57,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990280703] [2022-01-18 16:26:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:57,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:57,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:57,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:57,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990280703] [2022-01-18 16:26:57,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990280703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:57,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555785934] [2022-01-18 16:26:57,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:26:57,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:57,077 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) [2022-01-18 16:26:57,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 16:26:57,101 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:26:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:57,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:57,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:57,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:26:57,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555785934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:57,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:57,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:26:57,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182158859] [2022-01-18 16:26:57,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:57,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:26:57,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:26:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:26:57,176 INFO L87 Difference]: Start difference. First operand 3280 states and 12686 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-01-18 16:26:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:57,281 INFO L93 Difference]: Finished difference Result 3719 states and 13964 transitions. [2022-01-18 16:26:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:26:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 29 [2022-01-18 16:26:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:57,291 INFO L225 Difference]: With dead ends: 3719 [2022-01-18 16:26:57,291 INFO L226 Difference]: Without dead ends: 3719 [2022-01-18 16:26:57,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:26:57,292 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:57,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 72 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2022-01-18 16:26:57,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3290. [2022-01-18 16:26:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 3.834296138643965) internal successors, (12611), 3289 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 12611 transitions. [2022-01-18 16:26:57,392 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 12611 transitions. Word has length 29 [2022-01-18 16:26:57,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:57,392 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 12611 transitions. [2022-01-18 16:26:57,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2022-01-18 16:26:57,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 12611 transitions. [2022-01-18 16:26:57,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:26:57,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:57,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:57,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:57,614 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,SelfDestructingSolverStorable16 [2022-01-18 16:26:57,614 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:57,615 INFO L85 PathProgramCache]: Analyzing trace with hash 669340768, now seen corresponding path program 12 times [2022-01-18 16:26:57,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:57,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969472815] [2022-01-18 16:26:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:57,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:57,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:57,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969472815] [2022-01-18 16:26:57,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969472815] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008719232] [2022-01-18 16:26:57,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:26:57,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:57,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:57,641 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) [2022-01-18 16:26:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 16:26:57,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:26:57,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:26:57,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 16:26:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:57,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:57,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:57,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008719232] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:57,776 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:57,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 16:26:57,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996488277] [2022-01-18 16:26:57,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:57,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 16:26:57,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 16:26:57,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 16:26:57,777 INFO L87 Difference]: Start difference. First operand 3290 states and 12611 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:57,893 INFO L93 Difference]: Finished difference Result 6009 states and 21708 transitions. [2022-01-18 16:26:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 16:26:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-18 16:26:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:57,909 INFO L225 Difference]: With dead ends: 6009 [2022-01-18 16:26:57,909 INFO L226 Difference]: Without dead ends: 5981 [2022-01-18 16:26:57,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-01-18 16:26:57,909 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 98 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:57,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 115 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 16:26:57,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5981 states. [2022-01-18 16:26:57,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5981 to 4628. [2022-01-18 16:26:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 3.7905770477631293) internal successors, (17539), 4627 states have internal predecessors, (17539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 17539 transitions. [2022-01-18 16:26:58,011 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 17539 transitions. Word has length 31 [2022-01-18 16:26:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 4628 states and 17539 transitions. [2022-01-18 16:26:58,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 17539 transitions. [2022-01-18 16:26:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-18 16:26:58,020 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:58,020 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:58,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:58,239 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,SelfDestructingSolverStorable17 [2022-01-18 16:26:58,239 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1344478628, now seen corresponding path program 13 times [2022-01-18 16:26:58,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:58,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891304003] [2022-01-18 16:26:58,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:58,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:58,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:26:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891304003] [2022-01-18 16:26:58,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891304003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:26:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520133229] [2022-01-18 16:26:58,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:26:58,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:58,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:26:58,262 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) [2022-01-18 16:26:58,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 16:26:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:26:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:26:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:26:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:58,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:26:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:26:58,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520133229] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:26:58,382 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:26:58,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-01-18 16:26:58,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598451429] [2022-01-18 16:26:58,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:26:58,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 16:26:58,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:26:58,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 16:26:58,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-01-18 16:26:58,383 INFO L87 Difference]: Start difference. First operand 4628 states and 17539 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2022-01-18 16:26:58,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:26:58,838 INFO L93 Difference]: Finished difference Result 6507 states and 22973 transitions. [2022-01-18 16:26:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 16:26:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 31 [2022-01-18 16:26:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:26:58,854 INFO L225 Difference]: With dead ends: 6507 [2022-01-18 16:26:58,854 INFO L226 Difference]: Without dead ends: 6444 [2022-01-18 16:26:58,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:26:58,855 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 227 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:26:58,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 147 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 16:26:58,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6444 states. [2022-01-18 16:26:58,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6444 to 4591. [2022-01-18 16:26:58,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4591 states, 4590 states have (on average 3.7444444444444445) internal successors, (17187), 4590 states have internal predecessors, (17187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:26:58,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 17187 transitions. [2022-01-18 16:26:58,985 INFO L78 Accepts]: Start accepts. Automaton has 4591 states and 17187 transitions. Word has length 31 [2022-01-18 16:26:58,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:26:58,985 INFO L470 AbstractCegarLoop]: Abstraction has 4591 states and 17187 transitions. [2022-01-18 16:26:58,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2022-01-18 16:26:58,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4591 states and 17187 transitions. [2022-01-18 16:26:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:26:58,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:26:58,994 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:26:59,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 16:26:59,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:26:59,210 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:26:59,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:26:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1424343976, now seen corresponding path program 14 times [2022-01-18 16:26:59,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:26:59,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983372731] [2022-01-18 16:26:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:26:59,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:26:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:00,275 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:00,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983372731] [2022-01-18 16:27:00,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983372731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:00,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568914843] [2022-01-18 16:27:00,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:27:00,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:00,277 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) [2022-01-18 16:27:00,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 16:27:00,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:27:00,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:00,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:27:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:01,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:27:01,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 71 [2022-01-18 16:27:01,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 114 [2022-01-18 16:27:01,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 59 [2022-01-18 16:27:01,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:27:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:01,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:01,926 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:27:01,926 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 242 treesize of output 232 [2022-01-18 16:27:09,792 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-01-18 16:27:09,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 801 treesize of output 635 [2022-01-18 16:27:11,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:11,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:11,833 INFO L353 Elim1Store]: treesize reduction 22, result has 71.4 percent of original size [2022-01-18 16:27:11,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 215 treesize of output 197 [2022-01-18 16:27:12,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:12,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:12,307 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:27:12,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 222 treesize of output 1 [2022-01-18 16:27:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:12,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:12,346 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:27:12,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 772 treesize of output 1 [2022-01-18 16:27:12,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:12,416 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:27:12,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:27:12,465 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:12,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568914843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:12,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:12,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-01-18 16:27:12,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554110992] [2022-01-18 16:27:12,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:12,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:27:12,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:12,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:27:12,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:27:12,468 INFO L87 Difference]: Start difference. First operand 4591 states and 17187 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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) [2022-01-18 16:27:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:14,045 INFO L93 Difference]: Finished difference Result 7254 states and 26374 transitions. [2022-01-18 16:27:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 16:27:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 33 [2022-01-18 16:27:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:14,062 INFO L225 Difference]: With dead ends: 7254 [2022-01-18 16:27:14,062 INFO L226 Difference]: Without dead ends: 7141 [2022-01-18 16:27:14,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:27:14,063 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 196 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:14,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 203 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1137 Invalid, 0 Unknown, 111 Unchecked, 1.0s Time] [2022-01-18 16:27:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7141 states. [2022-01-18 16:27:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7141 to 4923. [2022-01-18 16:27:14,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4923 states, 4922 states have (on average 3.7230800487606666) internal successors, (18325), 4922 states have internal predecessors, (18325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:14,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4923 states to 4923 states and 18325 transitions. [2022-01-18 16:27:14,158 INFO L78 Accepts]: Start accepts. Automaton has 4923 states and 18325 transitions. Word has length 33 [2022-01-18 16:27:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:14,158 INFO L470 AbstractCegarLoop]: Abstraction has 4923 states and 18325 transitions. [2022-01-18 16:27:14,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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) [2022-01-18 16:27:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 4923 states and 18325 transitions. [2022-01-18 16:27:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:14,167 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:14,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:14,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 16:27:14,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:14,383 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:14,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1674310878, now seen corresponding path program 15 times [2022-01-18 16:27:14,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:14,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427587155] [2022-01-18 16:27:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:14,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:14,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:27:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:34,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:27:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427587155] [2022-01-18 16:27:34,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427587155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:27:34,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825830732] [2022-01-18 16:27:34,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:27:34,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:34,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:27:34,953 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) [2022-01-18 16:27:34,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 16:27:34,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:27:34,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:27:34,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:27:34,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:27:35,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:27:36,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 96 [2022-01-18 16:27:36,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 191 treesize of output 141 [2022-01-18 16:27:36,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 87 [2022-01-18 16:27:36,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:36,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 100 treesize of output 86 [2022-01-18 16:27:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:37,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:27:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:37,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:27:37,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 47 [2022-01-18 16:27:41,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:41,204 INFO L353 Elim1Store]: treesize reduction 19, result has 78.2 percent of original size [2022-01-18 16:27:41,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 353 treesize of output 284 [2022-01-18 16:27:43,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:43,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:43,470 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:27:43,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 368 treesize of output 282 [2022-01-18 16:27:44,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:44,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:44,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:27:44,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 384 treesize of output 316 [2022-01-18 16:27:47,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:47,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:47,512 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:27:47,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 369 treesize of output 1 [2022-01-18 16:27:47,689 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:27:47,690 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 8 treesize of output 8 [2022-01-18 16:27:47,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:27:47,716 INFO L353 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-01-18 16:27:47,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 [2022-01-18 16:27:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:27:47,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825830732] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:27:47,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:27:47,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-01-18 16:27:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216396884] [2022-01-18 16:27:47,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:27:47,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:27:47,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:27:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:27:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:27:47,798 INFO L87 Difference]: Start difference. First operand 4923 states and 18325 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:50,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:27:50,183 INFO L93 Difference]: Finished difference Result 8172 states and 29250 transitions. [2022-01-18 16:27:50,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:27:50,184 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:27:50,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:27:50,199 INFO L225 Difference]: With dead ends: 8172 [2022-01-18 16:27:50,200 INFO L226 Difference]: Without dead ends: 8014 [2022-01-18 16:27:50,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=434, Invalid=2428, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:27:50,201 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 309 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 643 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:27:50,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 354 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1739 Invalid, 0 Unknown, 643 Unchecked, 1.2s Time] [2022-01-18 16:27:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2022-01-18 16:27:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 4999. [2022-01-18 16:27:50,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4999 states, 4998 states have (on average 3.7170868347338937) internal successors, (18578), 4998 states have internal predecessors, (18578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4999 states to 4999 states and 18578 transitions. [2022-01-18 16:27:50,299 INFO L78 Accepts]: Start accepts. Automaton has 4999 states and 18578 transitions. Word has length 33 [2022-01-18 16:27:50,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:27:50,299 INFO L470 AbstractCegarLoop]: Abstraction has 4999 states and 18578 transitions. [2022-01-18 16:27:50,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:27:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 4999 states and 18578 transitions. [2022-01-18 16:27:50,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:27:50,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:27:50,308 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:27:50,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-01-18 16:27:50,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:27:50,524 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:27:50,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:27:50,524 INFO L85 PathProgramCache]: Analyzing trace with hash -856978606, now seen corresponding path program 16 times [2022-01-18 16:27:50,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:27:50,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521831714] [2022-01-18 16:27:50,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:27:50,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:27:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:28:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:10,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:28:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521831714] [2022-01-18 16:28:10,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521831714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:28:10,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241278131] [2022-01-18 16:28:10,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:28:10,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:28:10,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:28:10,091 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) [2022-01-18 16:28:10,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 16:28:10,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:28:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:28:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 16:28:10,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:28:10,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:28:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:11,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 76 [2022-01-18 16:28:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:28:11,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 135 [2022-01-18 16:28:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:28:11,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 74 [2022-01-18 16:28:11,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:28:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:28:11,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:28:11,999 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:28:11,999 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 204 treesize of output 194 [2022-01-18 16:28:27,903 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-01-18 16:28:27,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2395 treesize of output 1717 [2022-01-18 16:29:00,399 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-18 16:29:00,400 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 108 treesize of output 86 [2022-01-18 16:29:00,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:00,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241278131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:00,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:00,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-01-18 16:29:00,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615623447] [2022-01-18 16:29:00,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:00,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:29:00,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:00,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:29:00,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:29:00,495 INFO L87 Difference]: Start difference. First operand 4999 states and 18578 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:02,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:02,854 INFO L93 Difference]: Finished difference Result 8478 states and 30483 transitions. [2022-01-18 16:29:02,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 16:29:02,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:02,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:02,872 INFO L225 Difference]: With dead ends: 8478 [2022-01-18 16:29:02,872 INFO L226 Difference]: Without dead ends: 8393 [2022-01-18 16:29:02,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=363, Invalid=1617, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 16:29:02,873 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 280 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:02,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 258 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1228 Invalid, 0 Unknown, 174 Unchecked, 1.0s Time] [2022-01-18 16:29:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-01-18 16:29:02,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 5067. [2022-01-18 16:29:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.715357283853139) internal successors, (18822), 5066 states have internal predecessors, (18822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:02,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 18822 transitions. [2022-01-18 16:29:02,977 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 18822 transitions. Word has length 33 [2022-01-18 16:29:02,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:02,977 INFO L470 AbstractCegarLoop]: Abstraction has 5067 states and 18822 transitions. [2022-01-18 16:29:02,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 30 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:02,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 18822 transitions. [2022-01-18 16:29:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:02,986 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:02,986 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:03,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:03,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:03,202 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash -720009752, now seen corresponding path program 17 times [2022-01-18 16:29:03,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620346175] [2022-01-18 16:29:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:03,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:03,227 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 16:29:03,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:03,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620346175] [2022-01-18 16:29:03,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620346175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:03,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632680813] [2022-01-18 16:29:03,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:29:03,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:03,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:03,228 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) [2022-01-18 16:29:03,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:29:03,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 16:29:03,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 16:29:03,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:29:03,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-18 16:29:03,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632680813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:03,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:03,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-01-18 16:29:03,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150089244] [2022-01-18 16:29:03,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:03,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 16:29:03,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:03,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 16:29:03,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 16:29:03,357 INFO L87 Difference]: Start difference. First operand 5067 states and 18822 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:03,426 INFO L93 Difference]: Finished difference Result 7347 states and 26443 transitions. [2022-01-18 16:29:03,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 16:29:03,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:29:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:03,441 INFO L225 Difference]: With dead ends: 7347 [2022-01-18 16:29:03,441 INFO L226 Difference]: Without dead ends: 7129 [2022-01-18 16:29:03,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 16:29:03,442 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:03,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 45 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 16:29:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7129 states. [2022-01-18 16:29:03,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7129 to 6213. [2022-01-18 16:29:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6213 states, 6212 states have (on average 3.585962652929813) internal successors, (22276), 6212 states have internal predecessors, (22276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6213 states to 6213 states and 22276 transitions. [2022-01-18 16:29:03,545 INFO L78 Accepts]: Start accepts. Automaton has 6213 states and 22276 transitions. Word has length 33 [2022-01-18 16:29:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:03,545 INFO L470 AbstractCegarLoop]: Abstraction has 6213 states and 22276 transitions. [2022-01-18 16:29:03,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:03,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6213 states and 22276 transitions. [2022-01-18 16:29:03,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:03,556 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:03,556 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:03,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:03,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:03,772 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:03,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1696023130, now seen corresponding path program 18 times [2022-01-18 16:29:03,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:03,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453050890] [2022-01-18 16:29:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:03,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:03,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:04,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:04,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453050890] [2022-01-18 16:29:04,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453050890] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:04,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741557682] [2022-01-18 16:29:04,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:29:04,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:04,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:04,272 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) [2022-01-18 16:29:04,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 16:29:04,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:29:04,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:04,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:29:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:04,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:29:05,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:05,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:05,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:05,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 67 [2022-01-18 16:29:05,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:05,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:29:05,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:05,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 115 [2022-01-18 16:29:05,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2022-01-18 16:29:05,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 71 [2022-01-18 16:29:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:05,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:06,205 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 210 treesize of output 206 [2022-01-18 16:29:06,236 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 194 treesize of output 190 [2022-01-18 16:29:06,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:06,281 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 50 treesize of output 46 [2022-01-18 16:29:06,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:06,298 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 46 treesize of output 42 [2022-01-18 16:29:06,331 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 226 treesize of output 218 [2022-01-18 16:29:06,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 202 [2022-01-18 16:29:06,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:06,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-18 16:29:06,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:06,484 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 32 treesize of output 30 [2022-01-18 16:29:15,996 INFO L353 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-01-18 16:29:15,996 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 131 treesize of output 103 [2022-01-18 16:29:16,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,016 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:16,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 30 [2022-01-18 16:29:16,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,027 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:16,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2022-01-18 16:29:16,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,043 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:16,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 160 treesize of output 1 [2022-01-18 16:29:16,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,075 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 16:29:16,075 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 160 treesize of output 145 [2022-01-18 16:29:16,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,124 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:16,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 1 [2022-01-18 16:29:16,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,160 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:29:16,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 95 treesize of output 94 [2022-01-18 16:29:16,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,185 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 1 [2022-01-18 16:29:16,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,196 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 1 [2022-01-18 16:29:16,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,232 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:29:16,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 91 treesize of output 90 [2022-01-18 16:29:16,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,265 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,265 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 1 [2022-01-18 16:29:16,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,278 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,278 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 92 treesize of output 1 [2022-01-18 16:29:16,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,291 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 1 [2022-01-18 16:29:16,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,303 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 1 [2022-01-18 16:29:16,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,315 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:16,315 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 53 treesize of output 1 [2022-01-18 16:29:16,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,326 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:16,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 1 [2022-01-18 16:29:16,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,338 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:16,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 1 [2022-01-18 16:29:16,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,348 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:16,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 56 treesize of output 1 [2022-01-18 16:29:16,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,360 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:16,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 123 treesize of output 1 [2022-01-18 16:29:16,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,369 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:16,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 123 treesize of output 1 [2022-01-18 16:29:16,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:16,482 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:16,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:29:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:16,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741557682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:16,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:16,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-01-18 16:29:16,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908160277] [2022-01-18 16:29:16,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:16,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:29:16,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:29:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:29:16,527 INFO L87 Difference]: Start difference. First operand 6213 states and 22276 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 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) [2022-01-18 16:29:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:20,706 INFO L93 Difference]: Finished difference Result 11931 states and 41227 transitions. [2022-01-18 16:29:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:29:20,706 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 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 33 [2022-01-18 16:29:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:20,729 INFO L225 Difference]: With dead ends: 11931 [2022-01-18 16:29:20,729 INFO L226 Difference]: Without dead ends: 11734 [2022-01-18 16:29:20,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=344, Invalid=1912, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:29:20,730 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 338 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:20,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 213 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-18 16:29:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11734 states. [2022-01-18 16:29:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11734 to 6877. [2022-01-18 16:29:20,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 6876 states have (on average 3.576061663757999) internal successors, (24589), 6876 states have internal predecessors, (24589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:20,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 24589 transitions. [2022-01-18 16:29:20,856 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 24589 transitions. Word has length 33 [2022-01-18 16:29:20,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:20,856 INFO L470 AbstractCegarLoop]: Abstraction has 6877 states and 24589 transitions. [2022-01-18 16:29:20,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 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) [2022-01-18 16:29:20,856 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 24589 transitions. [2022-01-18 16:29:20,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:20,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:20,867 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:20,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:21,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:21,067 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:21,067 INFO L85 PathProgramCache]: Analyzing trace with hash -499710688, now seen corresponding path program 19 times [2022-01-18 16:29:21,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:21,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071940628] [2022-01-18 16:29:21,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:21,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:21,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071940628] [2022-01-18 16:29:21,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071940628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:21,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349177456] [2022-01-18 16:29:21,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:29:21,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:21,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:21,741 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) [2022-01-18 16:29:21,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 16:29:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:29:21,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:22,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:29:22,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 72 [2022-01-18 16:29:22,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:22,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 80 [2022-01-18 16:29:22,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 125 [2022-01-18 16:29:23,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:29:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:23,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:24,008 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:24,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 986 treesize of output 946 [2022-01-18 16:29:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,630 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:29:33,630 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 54 treesize of output 67 [2022-01-18 16:29:33,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,687 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-01-18 16:29:33,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 52 [2022-01-18 16:29:33,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,725 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 16:29:33,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 95 treesize of output 99 [2022-01-18 16:29:33,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,847 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 16:29:33,847 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 80 treesize of output 85 [2022-01-18 16:29:33,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,912 INFO L353 Elim1Store]: treesize reduction 37, result has 17.8 percent of original size [2022-01-18 16:29:33,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 46 treesize of output 39 [2022-01-18 16:29:33,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,941 INFO L353 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2022-01-18 16:29:33,941 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 46 [2022-01-18 16:29:33,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,973 INFO L353 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2022-01-18 16:29:33,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 79 treesize of output 70 [2022-01-18 16:29:33,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:33,989 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:33,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 31 [2022-01-18 16:29:34,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:34,006 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:34,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 79 treesize of output 55 [2022-01-18 16:29:34,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:34,027 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:34,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 1 [2022-01-18 16:29:34,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:34,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:34,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:29:34,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 467 treesize of output 403 [2022-01-18 16:29:35,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,319 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:35,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 1 [2022-01-18 16:29:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,334 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:35,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 1 [2022-01-18 16:29:35,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,355 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:35,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 1 [2022-01-18 16:29:35,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,371 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:35,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 1 [2022-01-18 16:29:35,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,388 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:35,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 91 treesize of output 1 [2022-01-18 16:29:35,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,401 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:35,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 1 [2022-01-18 16:29:35,409 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-18 16:29:35,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,421 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:35,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 75 treesize of output 1 [2022-01-18 16:29:35,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,437 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:35,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 46 treesize of output 1 [2022-01-18 16:29:35,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,449 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:29:35,449 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 45 treesize of output 1 [2022-01-18 16:29:35,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,464 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:29:35,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 92 treesize of output 1 [2022-01-18 16:29:35,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,662 INFO L353 Elim1Store]: treesize reduction 20, result has 4.8 percent of original size [2022-01-18 16:29:35,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 1 [2022-01-18 16:29:35,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:29:35,670 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:29:35,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:29:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:35,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349177456] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:29:35,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:29:35,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-01-18 16:29:35,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418641785] [2022-01-18 16:29:35,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:29:35,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:29:35,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:29:35,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:29:35,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:29:35,718 INFO L87 Difference]: Start difference. First operand 6877 states and 24589 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 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) [2022-01-18 16:29:40,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:29:40,049 INFO L93 Difference]: Finished difference Result 11210 states and 38853 transitions. [2022-01-18 16:29:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:29:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 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 33 [2022-01-18 16:29:40,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:29:40,075 INFO L225 Difference]: With dead ends: 11210 [2022-01-18 16:29:40,075 INFO L226 Difference]: Without dead ends: 11161 [2022-01-18 16:29:40,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=286, Invalid=1436, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 16:29:40,076 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 294 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 404 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:29:40,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 203 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 809 Invalid, 0 Unknown, 404 Unchecked, 0.8s Time] [2022-01-18 16:29:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11161 states. [2022-01-18 16:29:40,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11161 to 7056. [2022-01-18 16:29:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7056 states, 7055 states have (on average 3.5655563430191353) internal successors, (25155), 7055 states have internal predecessors, (25155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:29:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7056 states to 7056 states and 25155 transitions. [2022-01-18 16:29:40,199 INFO L78 Accepts]: Start accepts. Automaton has 7056 states and 25155 transitions. Word has length 33 [2022-01-18 16:29:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:29:40,199 INFO L470 AbstractCegarLoop]: Abstraction has 7056 states and 25155 transitions. [2022-01-18 16:29:40,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 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) [2022-01-18 16:29:40,200 INFO L276 IsEmpty]: Start isEmpty. Operand 7056 states and 25155 transitions. [2022-01-18 16:29:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:29:40,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:29:40,211 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:29:40,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 16:29:40,411 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,SelfDestructingSolverStorable24 [2022-01-18 16:29:40,411 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:29:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:29:40,412 INFO L85 PathProgramCache]: Analyzing trace with hash 9897112, now seen corresponding path program 20 times [2022-01-18 16:29:40,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:29:40,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546430092] [2022-01-18 16:29:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:29:40,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:29:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:29:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:41,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:29:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546430092] [2022-01-18 16:29:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546430092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:29:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105598311] [2022-01-18 16:29:41,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:29:41,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:29:41,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:29:41,231 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) [2022-01-18 16:29:41,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 16:29:41,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:29:41,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:29:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:29:41,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:29:41,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:29:42,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2022-01-18 16:29:42,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 123 [2022-01-18 16:29:42,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 74 [2022-01-18 16:29:42,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:29:42,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:29:42,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:29:43,427 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:29:43,427 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 1016 treesize of output 976 [2022-01-18 16:29:58,149 INFO L353 Elim1Store]: treesize reduction 29, result has 70.1 percent of original size [2022-01-18 16:29:58,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1147 treesize of output 936 [2022-01-18 16:30:03,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:03,216 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:30:03,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1184 treesize of output 944 [2022-01-18 16:30:05,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:05,052 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:30:05,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:30:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:05,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105598311] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:05,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:05,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-01-18 16:30:05,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23920952] [2022-01-18 16:30:05,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:05,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:30:05,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:05,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:30:05,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:30:05,102 INFO L87 Difference]: Start difference. First operand 7056 states and 25155 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2022-01-18 16:30:10,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:10,780 INFO L93 Difference]: Finished difference Result 8088 states and 28354 transitions. [2022-01-18 16:30:10,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 16:30:10,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 33 [2022-01-18 16:30:10,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:10,796 INFO L225 Difference]: With dead ends: 8088 [2022-01-18 16:30:10,796 INFO L226 Difference]: Without dead ends: 8030 [2022-01-18 16:30:10,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:30:10,797 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 237 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:10,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 187 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 711 Invalid, 0 Unknown, 132 Unchecked, 0.7s Time] [2022-01-18 16:30:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8030 states. [2022-01-18 16:30:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8030 to 7322. [2022-01-18 16:30:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7322 states, 7321 states have (on average 3.5577106952602104) internal successors, (26046), 7321 states have internal predecessors, (26046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:10,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7322 states to 7322 states and 26046 transitions. [2022-01-18 16:30:10,904 INFO L78 Accepts]: Start accepts. Automaton has 7322 states and 26046 transitions. Word has length 33 [2022-01-18 16:30:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:10,904 INFO L470 AbstractCegarLoop]: Abstraction has 7322 states and 26046 transitions. [2022-01-18 16:30:10,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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) [2022-01-18 16:30:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7322 states and 26046 transitions. [2022-01-18 16:30:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:10,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:10,916 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:10,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:11,116 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,SelfDestructingSolverStorable25 [2022-01-18 16:30:11,116 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:11,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2008756056, now seen corresponding path program 21 times [2022-01-18 16:30:11,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:11,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053476267] [2022-01-18 16:30:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:11,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:12,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053476267] [2022-01-18 16:30:12,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053476267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:12,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118588500] [2022-01-18 16:30:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:30:12,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:12,048 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) [2022-01-18 16:30:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 16:30:12,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 16:30:12,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:30:12,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:12,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:30:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:13,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 33 [2022-01-18 16:30:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:13,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:13,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 74 [2022-01-18 16:30:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:13,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:13,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:13,351 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 115 [2022-01-18 16:30:13,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:30:13,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:13,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:30:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:13,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:14,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:14,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 938 treesize of output 898 [2022-01-18 16:30:36,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:37,002 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:30:37,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1772 treesize of output 1319 [2022-01-18 16:30:44,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:30:44,914 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:30:44,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:30:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118588500] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:30:44,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:30:44,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 33 [2022-01-18 16:30:44,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956271374] [2022-01-18 16:30:44,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:30:44,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-18 16:30:44,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:30:44,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-18 16:30:44,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 16:30:44,953 INFO L87 Difference]: Start difference. First operand 7322 states and 26046 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:47,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:30:47,668 INFO L93 Difference]: Finished difference Result 12052 states and 41634 transitions. [2022-01-18 16:30:47,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 16:30:47,669 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:30:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:30:47,692 INFO L225 Difference]: With dead ends: 12052 [2022-01-18 16:30:47,692 INFO L226 Difference]: Without dead ends: 11977 [2022-01-18 16:30:47,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=729, Invalid=3963, Unknown=0, NotChecked=0, Total=4692 [2022-01-18 16:30:47,693 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 203 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 810 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:30:47,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 250 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 583 Invalid, 0 Unknown, 810 Unchecked, 0.4s Time] [2022-01-18 16:30:47,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11977 states. [2022-01-18 16:30:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11977 to 7422. [2022-01-18 16:30:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7422 states, 7421 states have (on average 3.550869155100391) internal successors, (26351), 7421 states have internal predecessors, (26351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7422 states to 7422 states and 26351 transitions. [2022-01-18 16:30:47,837 INFO L78 Accepts]: Start accepts. Automaton has 7422 states and 26351 transitions. Word has length 33 [2022-01-18 16:30:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:30:47,838 INFO L470 AbstractCegarLoop]: Abstraction has 7422 states and 26351 transitions. [2022-01-18 16:30:47,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:30:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 7422 states and 26351 transitions. [2022-01-18 16:30:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:30:47,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:30:47,849 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:30:47,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 16:30:48,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 16:30:48,050 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:30:48,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:30:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash 437221552, now seen corresponding path program 22 times [2022-01-18 16:30:48,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:30:48,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718239786] [2022-01-18 16:30:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:30:48,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:30:48,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:30:48,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:48,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:30:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718239786] [2022-01-18 16:30:48,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718239786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:30:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727396170] [2022-01-18 16:30:48,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:30:48,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:30:48,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:30:48,846 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) [2022-01-18 16:30:48,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 16:30:48,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:30:48,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:30:48,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 16:30:48,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:30:49,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 16:30:49,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 72 [2022-01-18 16:30:49,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 64 [2022-01-18 16:30:49,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-01-18 16:30:50,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2022-01-18 16:30:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:30:50,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:30:50,974 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:30:50,974 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 874 treesize of output 834 [2022-01-18 16:31:00,039 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-01-18 16:31:00,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 746 treesize of output 610 [2022-01-18 16:31:02,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:02,481 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:31:02,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 701 treesize of output 1 [2022-01-18 16:31:02,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:02,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:02,503 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:31:02,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 384 treesize of output 1 [2022-01-18 16:31:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:02,582 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:31:02,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:31:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:02,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727396170] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:02,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:02,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2022-01-18 16:31:02,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099804682] [2022-01-18 16:31:02,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:02,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:31:02,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:02,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:31:02,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:31:02,640 INFO L87 Difference]: Start difference. First operand 7422 states and 26351 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:06,791 INFO L93 Difference]: Finished difference Result 11650 states and 39943 transitions. [2022-01-18 16:31:06,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:31:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:31:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:06,814 INFO L225 Difference]: With dead ends: 11650 [2022-01-18 16:31:06,815 INFO L226 Difference]: Without dead ends: 11427 [2022-01-18 16:31:06,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=373, Invalid=1883, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 16:31:06,816 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 314 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:06,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 264 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1392 Invalid, 0 Unknown, 300 Unchecked, 1.1s Time] [2022-01-18 16:31:06,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11427 states. [2022-01-18 16:31:06,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11427 to 7274. [2022-01-18 16:31:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7274 states, 7273 states have (on average 3.5561666437508594) internal successors, (25864), 7273 states have internal predecessors, (25864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7274 states to 7274 states and 25864 transitions. [2022-01-18 16:31:06,959 INFO L78 Accepts]: Start accepts. Automaton has 7274 states and 25864 transitions. Word has length 33 [2022-01-18 16:31:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:06,959 INFO L470 AbstractCegarLoop]: Abstraction has 7274 states and 25864 transitions. [2022-01-18 16:31:06,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 7274 states and 25864 transitions. [2022-01-18 16:31:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:31:06,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:06,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:06,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:07,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:07,170 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:07,171 INFO L85 PathProgramCache]: Analyzing trace with hash 646261356, now seen corresponding path program 23 times [2022-01-18 16:31:07,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:07,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644518170] [2022-01-18 16:31:07,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:07,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:08,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:08,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644518170] [2022-01-18 16:31:08,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644518170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:08,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690165579] [2022-01-18 16:31:08,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:31:08,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:08,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:08,182 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) [2022-01-18 16:31:08,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 16:31:08,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:31:08,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:08,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:31:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:08,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:31:09,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:31:09,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:31:09,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 76 [2022-01-18 16:31:09,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:31:09,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:31:09,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 123 [2022-01-18 16:31:09,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:31:09,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 70 [2022-01-18 16:31:09,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:31:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:09,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:10,297 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:10,297 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 624 treesize of output 600 [2022-01-18 16:31:24,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:24,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:31:24,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 84 treesize of output 104 [2022-01-18 16:31:24,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:24,868 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:31:24,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 74 treesize of output 1 [2022-01-18 16:31:24,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:24,877 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:31:24,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 1 [2022-01-18 16:31:24,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:24,884 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:31:24,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 256 treesize of output 176 [2022-01-18 16:31:24,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:24,971 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 16:31:24,971 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 77 treesize of output 80 [2022-01-18 16:31:25,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,024 INFO L353 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2022-01-18 16:31:25,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 76 treesize of output 65 [2022-01-18 16:31:25,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,078 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:31:25,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 89 treesize of output 88 [2022-01-18 16:31:25,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,130 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-01-18 16:31:25,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 88 treesize of output 73 [2022-01-18 16:31:25,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,147 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:31:25,147 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 227 treesize of output 1 [2022-01-18 16:31:25,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,166 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:31:25,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 76 treesize of output 50 [2022-01-18 16:31:25,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,182 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:31:25,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 69 treesize of output 1 [2022-01-18 16:31:25,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,219 INFO L353 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-18 16:31:25,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 153 treesize of output 125 [2022-01-18 16:31:25,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,265 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-01-18 16:31:25,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 115 [2022-01-18 16:31:25,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:31:25,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 100 [2022-01-18 16:31:25,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,530 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:31:25,530 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 81 treesize of output 1 [2022-01-18 16:31:25,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,544 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:31:25,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 72 treesize of output 1 [2022-01-18 16:31:25,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,585 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:31:25,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 146 treesize of output 123 [2022-01-18 16:31:25,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,640 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:31:25,640 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 147 treesize of output 1 [2022-01-18 16:31:25,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:31:25,768 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:31:25,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:31:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:25,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690165579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:31:25,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:31:25,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2022-01-18 16:31:25,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604411313] [2022-01-18 16:31:25,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:31:25,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:31:25,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:31:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:31:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:31:25,815 INFO L87 Difference]: Start difference. First operand 7274 states and 25864 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:31:27,756 INFO L93 Difference]: Finished difference Result 11118 states and 38307 transitions. [2022-01-18 16:31:27,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 16:31:27,757 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:31:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:31:27,779 INFO L225 Difference]: With dead ends: 11118 [2022-01-18 16:31:27,779 INFO L226 Difference]: Without dead ends: 10968 [2022-01-18 16:31:27,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 16:31:27,780 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 263 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:31:27,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 183 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 888 Invalid, 0 Unknown, 246 Unchecked, 0.7s Time] [2022-01-18 16:31:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10968 states. [2022-01-18 16:31:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10968 to 7280. [2022-01-18 16:31:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7280 states, 7279 states have (on average 3.560104409946421) internal successors, (25914), 7279 states have internal predecessors, (25914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7280 states to 7280 states and 25914 transitions. [2022-01-18 16:31:27,955 INFO L78 Accepts]: Start accepts. Automaton has 7280 states and 25914 transitions. Word has length 33 [2022-01-18 16:31:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:31:27,956 INFO L470 AbstractCegarLoop]: Abstraction has 7280 states and 25914 transitions. [2022-01-18 16:31:27,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 32 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:31:27,956 INFO L276 IsEmpty]: Start isEmpty. Operand 7280 states and 25914 transitions. [2022-01-18 16:31:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:31:27,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:31:27,966 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:31:27,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 16:31:28,166 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,SelfDestructingSolverStorable28 [2022-01-18 16:31:28,166 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:31:28,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:31:28,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1790889644, now seen corresponding path program 24 times [2022-01-18 16:31:28,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:31:28,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269600411] [2022-01-18 16:31:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:31:28,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:31:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:31:29,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:29,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:31:29,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269600411] [2022-01-18 16:31:29,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269600411] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:31:29,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58592638] [2022-01-18 16:31:29,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:31:29,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:31:29,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:31:29,088 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) [2022-01-18 16:31:29,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 16:31:29,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 16:31:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:31:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:31:29,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:31:29,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:31:30,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:31:30,121 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 97 [2022-01-18 16:31:30,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:31:30,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 172 treesize of output 154 [2022-01-18 16:31:30,150 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-01-18 16:31:30,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 82 [2022-01-18 16:31:32,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:31:32,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 125 treesize of output 113 [2022-01-18 16:31:32,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:31:32,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:31:32,771 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:31:32,772 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 1034 treesize of output 994 [2022-01-18 16:32:04,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:04,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:04,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:32:04,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 2272 treesize of output 1639 [2022-01-18 16:32:25,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:25,651 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:32:25,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 1 [2022-01-18 16:32:25,699 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:25,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58592638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:25,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:25,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 36 [2022-01-18 16:32:25,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286785969] [2022-01-18 16:32:25,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:25,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:32:25,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:25,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:32:25,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1089, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:32:25,701 INFO L87 Difference]: Start difference. First operand 7280 states and 25914 transitions. Second operand has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:30,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:30,307 INFO L93 Difference]: Finished difference Result 14863 states and 51071 transitions. [2022-01-18 16:32:30,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 16:32:30,308 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:32:30,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:30,342 INFO L225 Difference]: With dead ends: 14863 [2022-01-18 16:32:30,343 INFO L226 Difference]: Without dead ends: 14761 [2022-01-18 16:32:30,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1109, Invalid=4293, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 16:32:30,347 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 394 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:30,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 294 Invalid, 2783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1655 Invalid, 0 Unknown, 1024 Unchecked, 1.0s Time] [2022-01-18 16:32:30,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14761 states. [2022-01-18 16:32:30,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14761 to 7826. [2022-01-18 16:32:30,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7826 states, 7825 states have (on average 3.586964856230032) internal successors, (28068), 7825 states have internal predecessors, (28068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:30,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7826 states to 7826 states and 28068 transitions. [2022-01-18 16:32:30,520 INFO L78 Accepts]: Start accepts. Automaton has 7826 states and 28068 transitions. Word has length 33 [2022-01-18 16:32:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:30,520 INFO L470 AbstractCegarLoop]: Abstraction has 7826 states and 28068 transitions. [2022-01-18 16:32:30,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7826 states and 28068 transitions. [2022-01-18 16:32:30,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:32:30,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:30,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:30,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:30,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:30,732 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:32:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1550224012, now seen corresponding path program 25 times [2022-01-18 16:32:30,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:30,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402515473] [2022-01-18 16:32:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:30,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:31,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402515473] [2022-01-18 16:32:31,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402515473] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:31,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880286239] [2022-01-18 16:32:31,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:32:31,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:31,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:31,693 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) [2022-01-18 16:32:31,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 16:32:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:31,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:32:31,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:32,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:32:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:32:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:32:32,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 78 [2022-01-18 16:32:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:32:32,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:32:32,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 201 treesize of output 137 [2022-01-18 16:32:32,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:32:32,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 76 [2022-01-18 16:32:33,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:32:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:33,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:33,783 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:32:33,784 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 554 treesize of output 530 [2022-01-18 16:32:45,172 INFO L353 Elim1Store]: treesize reduction 29, result has 70.1 percent of original size [2022-01-18 16:32:45,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1107 treesize of output 864 [2022-01-18 16:32:49,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:49,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:49,505 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:32:49,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1152 treesize of output 876 [2022-01-18 16:32:51,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:32:51,404 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:32:51,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:32:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:51,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880286239] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:32:51,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:32:51,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 32 [2022-01-18 16:32:51,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245224864] [2022-01-18 16:32:51,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:32:51,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-18 16:32:51,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:32:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-18 16:32:51,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 16:32:51,456 INFO L87 Difference]: Start difference. First operand 7826 states and 28068 transitions. Second operand has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 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) [2022-01-18 16:32:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:32:55,765 INFO L93 Difference]: Finished difference Result 11949 states and 41850 transitions. [2022-01-18 16:32:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 16:32:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 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 33 [2022-01-18 16:32:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:32:55,789 INFO L225 Difference]: With dead ends: 11949 [2022-01-18 16:32:55,789 INFO L226 Difference]: Without dead ends: 11804 [2022-01-18 16:32:55,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=483, Invalid=2379, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 16:32:55,790 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 362 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:32:55,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 179 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 992 Invalid, 0 Unknown, 354 Unchecked, 0.8s Time] [2022-01-18 16:32:55,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11804 states. [2022-01-18 16:32:55,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11804 to 7847. [2022-01-18 16:32:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7847 states, 7846 states have (on average 3.586286005607953) internal successors, (28138), 7846 states have internal predecessors, (28138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:32:55,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7847 states to 7847 states and 28138 transitions. [2022-01-18 16:32:55,939 INFO L78 Accepts]: Start accepts. Automaton has 7847 states and 28138 transitions. Word has length 33 [2022-01-18 16:32:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:32:55,939 INFO L470 AbstractCegarLoop]: Abstraction has 7847 states and 28138 transitions. [2022-01-18 16:32:55,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 32 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) [2022-01-18 16:32:55,939 INFO L276 IsEmpty]: Start isEmpty. Operand 7847 states and 28138 transitions. [2022-01-18 16:32:55,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:32:55,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:32:55,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:32:55,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 16:32:56,155 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,SelfDestructingSolverStorable30 [2022-01-18 16:32:56,155 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:32:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:32:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1488917818, now seen corresponding path program 26 times [2022-01-18 16:32:56,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:32:56,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653393174] [2022-01-18 16:32:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:32:56,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:32:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:32:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:56,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:32:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653393174] [2022-01-18 16:32:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653393174] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:32:56,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539036104] [2022-01-18 16:32:56,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:32:56,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:32:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:32:56,985 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) [2022-01-18 16:32:56,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 16:32:57,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:32:57,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:32:57,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:32:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:32:57,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:32:57,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-01-18 16:32:57,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 65 [2022-01-18 16:32:57,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 80 [2022-01-18 16:32:57,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 46 [2022-01-18 16:32:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:32:57,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:32:58,572 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:32:58,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1042 treesize of output 1010 [2022-01-18 16:33:02,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:02,749 INFO L353 Elim1Store]: treesize reduction 14, result has 83.9 percent of original size [2022-01-18 16:33:02,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 294 treesize of output 270 [2022-01-18 16:33:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:04,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:04,319 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:33:04,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 279 treesize of output 1 [2022-01-18 16:33:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:04,379 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-01-18 16:33:04,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 295 treesize of output 274 [2022-01-18 16:33:09,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:09,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:09,884 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:33:09,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 310 treesize of output 272 [2022-01-18 16:33:11,965 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:33:11,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 8 [2022-01-18 16:33:11,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:11,983 INFO L353 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-01-18 16:33:11,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 [2022-01-18 16:33:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539036104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:33:12,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:33:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 25 [2022-01-18 16:33:12,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279213845] [2022-01-18 16:33:12,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:33:12,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 16:33:12,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:33:12,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 16:33:12,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 16:33:12,044 INFO L87 Difference]: Start difference. First operand 7847 states and 28138 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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) [2022-01-18 16:33:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:33:15,742 INFO L93 Difference]: Finished difference Result 14413 states and 49997 transitions. [2022-01-18 16:33:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:33:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 33 [2022-01-18 16:33:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:33:15,773 INFO L225 Difference]: With dead ends: 14413 [2022-01-18 16:33:15,773 INFO L226 Difference]: Without dead ends: 14270 [2022-01-18 16:33:15,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=462, Invalid=2618, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 16:33:15,774 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 314 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 1809 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 350 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:33:15,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 352 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1809 Invalid, 0 Unknown, 350 Unchecked, 1.2s Time] [2022-01-18 16:33:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14270 states. [2022-01-18 16:33:15,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14270 to 7845. [2022-01-18 16:33:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7845 states, 7844 states have (on average 3.5840132585415603) internal successors, (28113), 7844 states have internal predecessors, (28113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:33:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7845 states to 7845 states and 28113 transitions. [2022-01-18 16:33:15,941 INFO L78 Accepts]: Start accepts. Automaton has 7845 states and 28113 transitions. Word has length 33 [2022-01-18 16:33:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:33:15,941 INFO L470 AbstractCegarLoop]: Abstraction has 7845 states and 28113 transitions. [2022-01-18 16:33:15,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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) [2022-01-18 16:33:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7845 states and 28113 transitions. [2022-01-18 16:33:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:33:15,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:33:15,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:33:15,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 16:33:16,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:16,160 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:33:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:33:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash -817784198, now seen corresponding path program 27 times [2022-01-18 16:33:16,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:33:16,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790566966] [2022-01-18 16:33:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:33:16,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:33:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:33:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:17,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:33:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790566966] [2022-01-18 16:33:17,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790566966] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:33:17,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263828167] [2022-01-18 16:33:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:33:17,646 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:33:17,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:33:17,647 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) [2022-01-18 16:33:17,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 16:33:17,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 16:33:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:33:17,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:33:17,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:33:17,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:33:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 16:33:18,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,356 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:18,357 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 102 treesize of output 96 [2022-01-18 16:33:18,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:33:18,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:33:18,372 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 156 treesize of output 138 [2022-01-18 16:33:21,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 69 [2022-01-18 16:33:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:33:21,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:33:23,279 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 210 treesize of output 202 [2022-01-18 16:33:23,321 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 194 treesize of output 190 [2022-01-18 16:33:23,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:23,366 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 46 treesize of output 42 [2022-01-18 16:33:23,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:23,380 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 26 [2022-01-18 16:33:23,397 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 210 treesize of output 206 [2022-01-18 16:33:23,445 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 194 treesize of output 190 [2022-01-18 16:33:23,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:23,483 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 46 treesize of output 42 [2022-01-18 16:33:23,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:33:23,500 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 50 treesize of output 46 [2022-01-18 16:33:52,974 INFO L353 Elim1Store]: treesize reduction 10, result has 88.8 percent of original size [2022-01-18 16:33:52,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 2072 treesize of output 1623 [2022-01-18 16:34:14,328 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:34:14,329 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 65 treesize of output 74 [2022-01-18 16:34:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:14,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263828167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:34:14,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:34:14,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-18 16:34:14,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639171241] [2022-01-18 16:34:14,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:34:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:34:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:34:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:34:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:34:14,479 INFO L87 Difference]: Start difference. First operand 7845 states and 28113 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:34:41,026 INFO L93 Difference]: Finished difference Result 19219 states and 64298 transitions. [2022-01-18 16:34:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-18 16:34:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:34:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:34:41,062 INFO L225 Difference]: With dead ends: 19219 [2022-01-18 16:34:41,062 INFO L226 Difference]: Without dead ends: 18512 [2022-01-18 16:34:41,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9459 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=2992, Invalid=21188, Unknown=0, NotChecked=0, Total=24180 [2022-01-18 16:34:41,065 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 645 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 3903 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 4630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 605 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-18 16:34:41,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 801 Invalid, 4630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3903 Invalid, 0 Unknown, 605 Unchecked, 2.9s Time] [2022-01-18 16:34:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18512 states. [2022-01-18 16:34:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18512 to 8693. [2022-01-18 16:34:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8693 states, 8692 states have (on average 3.579958582604694) internal successors, (31117), 8692 states have internal predecessors, (31117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8693 states to 8693 states and 31117 transitions. [2022-01-18 16:34:41,258 INFO L78 Accepts]: Start accepts. Automaton has 8693 states and 31117 transitions. Word has length 33 [2022-01-18 16:34:41,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:34:41,259 INFO L470 AbstractCegarLoop]: Abstraction has 8693 states and 31117 transitions. [2022-01-18 16:34:41,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:34:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 8693 states and 31117 transitions. [2022-01-18 16:34:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:34:41,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:34:41,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:34:41,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 16:34:41,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:41,499 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:34:41,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:34:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash -784457146, now seen corresponding path program 28 times [2022-01-18 16:34:41,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:34:41,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765870695] [2022-01-18 16:34:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:34:41,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:34:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:34:42,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:42,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:34:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765870695] [2022-01-18 16:34:42,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765870695] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:34:42,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331258807] [2022-01-18 16:34:42,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:34:42,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:34:42,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:34:42,173 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) [2022-01-18 16:34:42,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 16:34:42,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:34:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:34:42,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-18 16:34:42,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:34:42,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:34:42,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:34:42,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-01-18 16:34:42,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-01-18 16:34:43,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2022-01-18 16:34:43,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 49 [2022-01-18 16:34:43,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:34:43,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:34:44,736 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-18 16:34:44,737 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 1112 treesize of output 1080 [2022-01-18 16:34:58,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:34:58,892 INFO L353 Elim1Store]: treesize reduction 19, result has 78.2 percent of original size [2022-01-18 16:34:58,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 617 treesize of output 512 [2022-01-18 16:35:00,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:00,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:00,768 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:35:00,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 639 treesize of output 513 [2022-01-18 16:35:01,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:01,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:01,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:01,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 609 treesize of output 501 [2022-01-18 16:35:04,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:04,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:04,167 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:35:04,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 587 treesize of output 1 [2022-01-18 16:35:04,406 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:35:04,406 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 8 treesize of output 8 [2022-01-18 16:35:04,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:04,430 INFO L353 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-01-18 16:35:04,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 [2022-01-18 16:35:04,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:04,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331258807] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:04,498 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:04,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 27 [2022-01-18 16:35:04,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641075673] [2022-01-18 16:35:04,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:04,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 16:35:04,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:04,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 16:35:04,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2022-01-18 16:35:04,499 INFO L87 Difference]: Start difference. First operand 8693 states and 31117 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2022-01-18 16:35:09,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:09,548 INFO L93 Difference]: Finished difference Result 16787 states and 58184 transitions. [2022-01-18 16:35:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 16:35:09,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 33 [2022-01-18 16:35:09,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:09,585 INFO L225 Difference]: With dead ends: 16787 [2022-01-18 16:35:09,586 INFO L226 Difference]: Without dead ends: 16605 [2022-01-18 16:35:09,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 16:35:09,586 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 419 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1491 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:09,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 332 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1491 Invalid, 0 Unknown, 235 Unchecked, 1.3s Time] [2022-01-18 16:35:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16605 states. [2022-01-18 16:35:09,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16605 to 8889. [2022-01-18 16:35:09,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8889 states, 8888 states have (on average 3.577857785778578) internal successors, (31800), 8888 states have internal predecessors, (31800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8889 states to 8889 states and 31800 transitions. [2022-01-18 16:35:09,783 INFO L78 Accepts]: Start accepts. Automaton has 8889 states and 31800 transitions. Word has length 33 [2022-01-18 16:35:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:09,783 INFO L470 AbstractCegarLoop]: Abstraction has 8889 states and 31800 transitions. [2022-01-18 16:35:09,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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) [2022-01-18 16:35:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 8889 states and 31800 transitions. [2022-01-18 16:35:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:35:09,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:09,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:09,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 16:35:09,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:09,997 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:35:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -400446888, now seen corresponding path program 29 times [2022-01-18 16:35:09,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:09,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730012265] [2022-01-18 16:35:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:09,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:10,667 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:10,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730012265] [2022-01-18 16:35:10,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730012265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:10,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707590341] [2022-01-18 16:35:10,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:35:10,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:10,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:10,668 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) [2022-01-18 16:35:10,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 16:35:10,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 16:35:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:10,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:35:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:10,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:35:11,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 16:35:11,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 178 treesize of output 128 [2022-01-18 16:35:11,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 76 [2022-01-18 16:35:12,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 72 [2022-01-18 16:35:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:12,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:13,100 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 32 treesize of output 30 [2022-01-18 16:35:13,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:13,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:13,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-01-18 16:35:13,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:13,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:13,143 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 32 treesize of output 30 [2022-01-18 16:35:13,158 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 36 treesize of output 34 [2022-01-18 16:35:13,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:13,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:13,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:25,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:25,911 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-01-18 16:35:25,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 575 treesize of output 452 [2022-01-18 16:35:27,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:27,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:27,696 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:35:27,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 597 treesize of output 453 [2022-01-18 16:35:28,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:28,441 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:35:28,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 84 treesize of output 104 [2022-01-18 16:35:28,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:28,784 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:35:28,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 74 treesize of output 1 [2022-01-18 16:35:28,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:28,841 INFO L353 Elim1Store]: treesize reduction 19, result has 75.3 percent of original size [2022-01-18 16:35:28,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 215 treesize of output 200 [2022-01-18 16:35:29,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,320 INFO L353 Elim1Store]: treesize reduction 55, result has 28.6 percent of original size [2022-01-18 16:35:29,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 222 treesize of output 167 [2022-01-18 16:35:29,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,383 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 16:35:29,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 95 treesize of output 99 [2022-01-18 16:35:29,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,520 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:35:29,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 1 [2022-01-18 16:35:29,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,533 INFO L353 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2022-01-18 16:35:29,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 85 treesize of output 1 [2022-01-18 16:35:29,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,545 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:35:29,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 79 treesize of output 55 [2022-01-18 16:35:29,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,586 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:35:29,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 1 [2022-01-18 16:35:29,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,599 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:35:29,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 1 [2022-01-18 16:35:29,764 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:35:29,764 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 8 treesize of output 8 [2022-01-18 16:35:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:29,783 INFO L353 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-01-18 16:35:29,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 45 [2022-01-18 16:35:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:29,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707590341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:29,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:29,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2022-01-18 16:35:29,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200864034] [2022-01-18 16:35:29,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:29,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 16:35:29,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 16:35:29,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-01-18 16:35:29,859 INFO L87 Difference]: Start difference. First operand 8889 states and 31800 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2022-01-18 16:35:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:38,036 INFO L93 Difference]: Finished difference Result 16209 states and 56172 transitions. [2022-01-18 16:35:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 16:35:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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 33 [2022-01-18 16:35:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:38,071 INFO L225 Difference]: With dead ends: 16209 [2022-01-18 16:35:38,071 INFO L226 Difference]: Without dead ends: 16020 [2022-01-18 16:35:38,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=606, Invalid=2934, Unknown=0, NotChecked=0, Total=3540 [2022-01-18 16:35:38,072 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 326 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:38,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 358 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 16:35:38,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16020 states. [2022-01-18 16:35:38,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16020 to 8535. [2022-01-18 16:35:38,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8535 states, 8534 states have (on average 3.5755800328099365) internal successors, (30514), 8534 states have internal predecessors, (30514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8535 states to 8535 states and 30514 transitions. [2022-01-18 16:35:38,256 INFO L78 Accepts]: Start accepts. Automaton has 8535 states and 30514 transitions. Word has length 33 [2022-01-18 16:35:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:38,256 INFO L470 AbstractCegarLoop]: Abstraction has 8535 states and 30514 transitions. [2022-01-18 16:35:38,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 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) [2022-01-18 16:35:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8535 states and 30514 transitions. [2022-01-18 16:35:38,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:35:38,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:38,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:38,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:38,476 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,SelfDestructingSolverStorable34 [2022-01-18 16:35:38,476 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:35:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -286706716, now seen corresponding path program 30 times [2022-01-18 16:35:38,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107578333] [2022-01-18 16:35:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:38,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:38,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107578333] [2022-01-18 16:35:38,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107578333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:38,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422268909] [2022-01-18 16:35:38,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 16:35:38,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:38,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:38,964 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) [2022-01-18 16:35:38,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 16:35:38,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 16:35:38,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:35:38,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:35:38,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:39,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:35:39,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 98 [2022-01-18 16:35:39,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 193 treesize of output 143 [2022-01-18 16:35:39,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 89 [2022-01-18 16:35:40,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 70 [2022-01-18 16:35:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:40,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:41,216 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 32 treesize of output 30 [2022-01-18 16:35:41,226 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 36 treesize of output 34 [2022-01-18 16:35:41,247 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 26 [2022-01-18 16:35:41,256 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 32 treesize of output 30 [2022-01-18 16:35:41,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:41,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:41,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:41,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:41,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:41,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:41,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:47,331 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-01-18 16:35:47,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 850 treesize of output 710 [2022-01-18 16:35:51,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:51,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:51,723 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:35:51,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 819 treesize of output 1 [2022-01-18 16:35:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:51,793 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:35:51,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:35:51,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:51,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422268909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:35:51,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:35:51,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-01-18 16:35:51,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014077366] [2022-01-18 16:35:51,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:35:51,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 16:35:51,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:35:51,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 16:35:51,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 16:35:51,843 INFO L87 Difference]: Start difference. First operand 8535 states and 30514 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 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) [2022-01-18 16:35:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:35:55,206 INFO L93 Difference]: Finished difference Result 15273 states and 52829 transitions. [2022-01-18 16:35:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 16:35:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 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 33 [2022-01-18 16:35:55,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:35:55,243 INFO L225 Difference]: With dead ends: 15273 [2022-01-18 16:35:55,243 INFO L226 Difference]: Without dead ends: 15002 [2022-01-18 16:35:55,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 16:35:55,244 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 301 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 16:35:55,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 198 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 16:35:55,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15002 states. [2022-01-18 16:35:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15002 to 8672. [2022-01-18 16:35:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8672 states, 8671 states have (on average 3.5754814900242184) internal successors, (31003), 8671 states have internal predecessors, (31003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:35:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8672 states to 8672 states and 31003 transitions. [2022-01-18 16:35:55,428 INFO L78 Accepts]: Start accepts. Automaton has 8672 states and 31003 transitions. Word has length 33 [2022-01-18 16:35:55,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:35:55,428 INFO L470 AbstractCegarLoop]: Abstraction has 8672 states and 31003 transitions. [2022-01-18 16:35:55,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 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) [2022-01-18 16:35:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 8672 states and 31003 transitions. [2022-01-18 16:35:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:35:55,441 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:35:55,441 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:35:55,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 16:35:55,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-01-18 16:35:55,643 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:35:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:35:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1301727298, now seen corresponding path program 31 times [2022-01-18 16:35:55,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:35:55,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860654970] [2022-01-18 16:35:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:35:55,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:35:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:56,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:35:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860654970] [2022-01-18 16:35:56,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860654970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:35:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261284797] [2022-01-18 16:35:56,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 16:35:56,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:35:56,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:35:56,267 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) [2022-01-18 16:35:56,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 16:35:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:35:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:35:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:35:56,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-01-18 16:35:56,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 39 [2022-01-18 16:35:56,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 64 [2022-01-18 16:35:56,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 100 [2022-01-18 16:35:57,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 71 [2022-01-18 16:35:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:35:57,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:35:58,581 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 32 treesize of output 30 [2022-01-18 16:35:58,593 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 36 treesize of output 34 [2022-01-18 16:35:58,617 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 26 [2022-01-18 16:35:58,629 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 32 treesize of output 30 [2022-01-18 16:35:58,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:58,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:58,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:58,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:58,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:58,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:35:58,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:35:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:36:12,602 INFO L353 Elim1Store]: treesize reduction 29, result has 70.1 percent of original size [2022-01-18 16:36:12,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1209 treesize of output 936 [2022-01-18 16:36:18,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:18,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:18,207 INFO L353 Elim1Store]: treesize reduction 18, result has 76.6 percent of original size [2022-01-18 16:36:18,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 1254 treesize of output 948 [2022-01-18 16:36:19,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:19,447 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:19,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:36:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:19,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261284797] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:19,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:19,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-01-18 16:36:19,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048870518] [2022-01-18 16:36:19,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:19,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 16:36:19,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 16:36:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-01-18 16:36:19,495 INFO L87 Difference]: Start difference. First operand 8672 states and 31003 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:36:25,025 INFO L93 Difference]: Finished difference Result 17807 states and 61308 transitions. [2022-01-18 16:36:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 16:36:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:36:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:36:25,068 INFO L225 Difference]: With dead ends: 17807 [2022-01-18 16:36:25,068 INFO L226 Difference]: Without dead ends: 17651 [2022-01-18 16:36:25,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=617, Invalid=3043, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 16:36:25,069 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 489 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 16:36:25,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [489 Valid, 262 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1920 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 16:36:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17651 states. [2022-01-18 16:36:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17651 to 8642. [2022-01-18 16:36:25,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8641 states have (on average 3.57574354820044) internal successors, (30898), 8641 states have internal predecessors, (30898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:25,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 30898 transitions. [2022-01-18 16:36:25,255 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 30898 transitions. Word has length 33 [2022-01-18 16:36:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:36:25,255 INFO L470 AbstractCegarLoop]: Abstraction has 8642 states and 30898 transitions. [2022-01-18 16:36:25,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 28 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:36:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 30898 transitions. [2022-01-18 16:36:25,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:36:25,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:36:25,268 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:36:25,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 16:36:25,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:25,469 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:36:25,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:36:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1900635082, now seen corresponding path program 32 times [2022-01-18 16:36:25,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:36:25,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452588722] [2022-01-18 16:36:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:36:25,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:36:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:36:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:26,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:36:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452588722] [2022-01-18 16:36:26,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452588722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:36:26,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975531137] [2022-01-18 16:36:26,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 16:36:26,038 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:36:26,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:36:26,039 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) [2022-01-18 16:36:26,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 16:36:26,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 16:36:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:36:26,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-18 16:36:26,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:36:26,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-01-18 16:36:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:36:26,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-01-18 16:36:26,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 64 [2022-01-18 16:36:26,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 58 [2022-01-18 16:36:27,090 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:27,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 37 treesize of output 43 [2022-01-18 16:36:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:27,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:36:33,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:36:33,607 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 1280 treesize of output 1257 [2022-01-18 16:36:46,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,492 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:36:46,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 161 treesize of output 146 [2022-01-18 16:36:46,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,652 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:36:46,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 1 [2022-01-18 16:36:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,662 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:46,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 101 treesize of output 63 [2022-01-18 16:36:46,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,701 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:36:46,701 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 162 treesize of output 1 [2022-01-18 16:36:46,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,715 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:46,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2022-01-18 16:36:46,723 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-18 16:36:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,737 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:46,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 75 treesize of output 1 [2022-01-18 16:36:46,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,781 INFO L353 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-18 16:36:46,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 168 treesize of output 148 [2022-01-18 16:36:46,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,933 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:46,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 105 treesize of output 67 [2022-01-18 16:36:46,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:46,994 INFO L353 Elim1Store]: treesize reduction 38, result has 25.5 percent of original size [2022-01-18 16:36:46,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 167 treesize of output 133 [2022-01-18 16:36:47,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:47,030 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:47,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2022-01-18 16:36:47,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:47,043 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:36:47,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 79 treesize of output 1 [2022-01-18 16:36:47,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:47,058 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:36:47,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 127 treesize of output 1 [2022-01-18 16:36:47,279 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:36:47,279 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 8 treesize of output 8 [2022-01-18 16:36:47,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:36:47,290 INFO L353 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-01-18 16:36:47,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 66 treesize of output 54 [2022-01-18 16:36:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:36:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975531137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:36:47,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:36:47,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2022-01-18 16:36:47,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623679486] [2022-01-18 16:36:47,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:36:47,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-18 16:36:47,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:36:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-18 16:36:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 16:36:47,385 INFO L87 Difference]: Start difference. First operand 8642 states and 30898 transitions. Second operand has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:16,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:37:16,387 INFO L93 Difference]: Finished difference Result 31433 states and 106618 transitions. [2022-01-18 16:37:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-18 16:37:16,387 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:37:16,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:37:16,478 INFO L225 Difference]: With dead ends: 31433 [2022-01-18 16:37:16,478 INFO L226 Difference]: Without dead ends: 30812 [2022-01-18 16:37:16,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12402 ImplicationChecksByTransitivity, 28.9s TimeCoverageRelationStatistics Valid=3198, Invalid=28663, Unknown=1, NotChecked=0, Total=31862 [2022-01-18 16:37:16,480 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 800 mSDsluCounter, 1355 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 6646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4827 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 16:37:16,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 453 Invalid, 6646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1699 Invalid, 0 Unknown, 4827 Unchecked, 1.4s Time] [2022-01-18 16:37:16,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30812 states. [2022-01-18 16:37:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30812 to 9728. [2022-01-18 16:37:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9728 states, 9727 states have (on average 3.5635858949316335) internal successors, (34663), 9727 states have internal predecessors, (34663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9728 states to 9728 states and 34663 transitions. [2022-01-18 16:37:16,772 INFO L78 Accepts]: Start accepts. Automaton has 9728 states and 34663 transitions. Word has length 33 [2022-01-18 16:37:16,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:37:16,772 INFO L470 AbstractCegarLoop]: Abstraction has 9728 states and 34663 transitions. [2022-01-18 16:37:16,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3947368421052633) internal successors, (91), 37 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:37:16,772 INFO L276 IsEmpty]: Start isEmpty. Operand 9728 states and 34663 transitions. [2022-01-18 16:37:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:37:16,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:37:16,786 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:37:16,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 16:37:16,986 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,SelfDestructingSolverStorable37 [2022-01-18 16:37:16,987 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:37:16,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:37:16,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2004350866, now seen corresponding path program 33 times [2022-01-18 16:37:16,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:37:16,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655116237] [2022-01-18 16:37:16,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:37:16,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:37:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:37:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:17,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:37:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655116237] [2022-01-18 16:37:17,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655116237] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:37:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394317501] [2022-01-18 16:37:17,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 16:37:17,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:37:17,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:37:17,812 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) [2022-01-18 16:37:17,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 16:37:17,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 16:37:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:37:17,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-18 16:37:17,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:37:18,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:37:18,289 INFO L353 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-01-18 16:37:18,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 32 [2022-01-18 16:37:18,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:18,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:18,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:18,676 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 108 treesize of output 102 [2022-01-18 16:37:18,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:18,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:18,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:18,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 94 [2022-01-18 16:37:21,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:37:21,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:21,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:37:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:37:21,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:37:24,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:24,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:24,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 577 treesize of output 553 [2022-01-18 16:37:59,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:37:59,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:37:59,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 2312 treesize of output 1687 [2022-01-18 16:38:26,579 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 16:38:26,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8 treesize of output 8 [2022-01-18 16:38:26,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:26,589 INFO L353 Elim1Store]: treesize reduction 15, result has 21.1 percent of original size [2022-01-18 16:38:26,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 19 [2022-01-18 16:38:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:26,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394317501] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:26,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:26,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-01-18 16:38:26,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637511123] [2022-01-18 16:38:26,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:26,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-18 16:38:26,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-18 16:38:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1177, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 16:38:26,649 INFO L87 Difference]: Start difference. First operand 9728 states and 34663 transitions. Second operand has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:41,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:38:41,701 INFO L93 Difference]: Finished difference Result 24784 states and 84299 transitions. [2022-01-18 16:38:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-18 16:38:41,702 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:38:41,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:38:41,766 INFO L225 Difference]: With dead ends: 24784 [2022-01-18 16:38:41,766 INFO L226 Difference]: Without dead ends: 24716 [2022-01-18 16:38:41,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 47 SyntacticMatches, 10 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6073 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=2575, Invalid=11467, Unknown=0, NotChecked=0, Total=14042 [2022-01-18 16:38:41,768 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 599 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4394 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 16:38:41,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 472 Invalid, 5639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1137 Invalid, 0 Unknown, 4394 Unchecked, 0.8s Time] [2022-01-18 16:38:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24716 states. [2022-01-18 16:38:42,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24716 to 9867. [2022-01-18 16:38:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9867 states, 9866 states have (on average 3.5641597405230083) internal successors, (35164), 9866 states have internal predecessors, (35164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9867 states to 9867 states and 35164 transitions. [2022-01-18 16:38:42,083 INFO L78 Accepts]: Start accepts. Automaton has 9867 states and 35164 transitions. Word has length 33 [2022-01-18 16:38:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:38:42,083 INFO L470 AbstractCegarLoop]: Abstraction has 9867 states and 35164 transitions. [2022-01-18 16:38:42,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.1538461538461537) internal successors, (84), 38 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:38:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9867 states and 35164 transitions. [2022-01-18 16:38:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:38:42,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:38:42,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:38:42,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 16:38:42,298 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,SelfDestructingSolverStorable38 [2022-01-18 16:38:42,298 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:38:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:38:42,298 INFO L85 PathProgramCache]: Analyzing trace with hash -126489808, now seen corresponding path program 34 times [2022-01-18 16:38:42,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:38:42,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755247207] [2022-01-18 16:38:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:38:42,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:38:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:38:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:42,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:38:42,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755247207] [2022-01-18 16:38:42,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755247207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:38:42,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720160209] [2022-01-18 16:38:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 16:38:42,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:38:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:38:42,853 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) [2022-01-18 16:38:42,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 16:38:42,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 16:38:42,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:38:42,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-18 16:38:42,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:38:43,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:38:43,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:38:43,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-18 16:38:43,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 64 [2022-01-18 16:38:43,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 100 [2022-01-18 16:38:44,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 69 [2022-01-18 16:38:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:44,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:38:45,151 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 194 treesize of output 190 [2022-01-18 16:38:45,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:45,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-01-18 16:38:45,201 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 178 treesize of output 174 [2022-01-18 16:38:45,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:45,255 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 42 treesize of output 38 [2022-01-18 16:38:45,272 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 194 treesize of output 190 [2022-01-18 16:38:45,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:45,304 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 46 treesize of output 42 [2022-01-18 16:38:45,324 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 210 treesize of output 206 [2022-01-18 16:38:45,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:45,387 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 50 treesize of output 46 [2022-01-18 16:38:53,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:53,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:53,931 INFO L353 Elim1Store]: treesize reduction 9, result has 88.3 percent of original size [2022-01-18 16:38:53,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 124 treesize of output 157 [2022-01-18 16:38:54,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,406 INFO L353 Elim1Store]: treesize reduction 46, result has 40.3 percent of original size [2022-01-18 16:38:54,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 131 treesize of output 123 [2022-01-18 16:38:54,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,530 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 16:38:54,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 95 treesize of output 99 [2022-01-18 16:38:54,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,736 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 16:38:54,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 85 [2022-01-18 16:38:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,859 INFO L353 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2022-01-18 16:38:54,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 70 [2022-01-18 16:38:54,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,889 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:38:54,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 79 treesize of output 55 [2022-01-18 16:38:54,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,923 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:38:54,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 96 treesize of output 1 [2022-01-18 16:38:54,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:54,986 INFO L353 Elim1Store]: treesize reduction 15, result has 66.7 percent of original size [2022-01-18 16:38:54,987 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 76 treesize of output 81 [2022-01-18 16:38:55,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,120 INFO L353 Elim1Store]: treesize reduction 29, result has 35.6 percent of original size [2022-01-18 16:38:55,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 66 [2022-01-18 16:38:55,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,229 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-01-18 16:38:55,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 95 [2022-01-18 16:38:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2022-01-18 16:38:55,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,366 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:38:55,366 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 1 [2022-01-18 16:38:55,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,379 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:38:55,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 92 treesize of output 1 [2022-01-18 16:38:55,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,399 INFO L353 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2022-01-18 16:38:55,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 433 treesize of output 1 [2022-01-18 16:38:55,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:38:55,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 7 treesize of output 12 [2022-01-18 16:38:55,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:38:55,668 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:38:55,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 26 treesize of output 1 [2022-01-18 16:38:55,671 WARN L234 Elim1Store]: Array PQE input equivalent to true [2022-01-18 16:38:55,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:38:55,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720160209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:38:55,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:38:55,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 30 [2022-01-18 16:38:55,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41010869] [2022-01-18 16:38:55,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:38:55,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-18 16:38:55,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:38:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-18 16:38:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2022-01-18 16:38:55,717 INFO L87 Difference]: Start difference. First operand 9867 states and 35164 transitions. Second operand has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 16:39:03,749 INFO L93 Difference]: Finished difference Result 20427 states and 70167 transitions. [2022-01-18 16:39:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 16:39:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-01-18 16:39:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 16:39:03,790 INFO L225 Difference]: With dead ends: 20427 [2022-01-18 16:39:03,791 INFO L226 Difference]: Without dead ends: 20199 [2022-01-18 16:39:03,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=670, Invalid=3886, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 16:39:03,791 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 390 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-18 16:39:03,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 408 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-18 16:39:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20199 states. [2022-01-18 16:39:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20199 to 9274. [2022-01-18 16:39:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9274 states, 9273 states have (on average 3.5681009382077) internal successors, (33087), 9273 states have internal predecessors, (33087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9274 states to 9274 states and 33087 transitions. [2022-01-18 16:39:03,990 INFO L78 Accepts]: Start accepts. Automaton has 9274 states and 33087 transitions. Word has length 33 [2022-01-18 16:39:03,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 16:39:03,990 INFO L470 AbstractCegarLoop]: Abstraction has 9274 states and 33087 transitions. [2022-01-18 16:39:03,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 30 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 16:39:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 9274 states and 33087 transitions. [2022-01-18 16:39:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-18 16:39:04,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 16:39:04,004 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 16:39:04,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 16:39:04,204 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,SelfDestructingSolverStorable39 [2022-01-18 16:39:04,204 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 16:39:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 16:39:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash 889067426, now seen corresponding path program 35 times [2022-01-18 16:39:04,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 16:39:04,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307397229] [2022-01-18 16:39:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 16:39:04,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 16:39:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 16:39:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:04,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 16:39:04,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307397229] [2022-01-18 16:39:04,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307397229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 16:39:04,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711457353] [2022-01-18 16:39:04,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 16:39:04,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:39:04,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 16:39:04,757 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) [2022-01-18 16:39:04,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 16:39:04,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 16:39:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 16:39:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjunts are in the unsatisfiable core [2022-01-18 16:39:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 16:39:04,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2022-01-18 16:39:05,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-01-18 16:39:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:05,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:05,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 76 [2022-01-18 16:39:05,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:05,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 16:39:05,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:05,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 140 [2022-01-18 16:39:06,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 48 [2022-01-18 16:39:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:06,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 16:39:14,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:14,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:14,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4370 treesize of output 4214 [2022-01-18 16:39:32,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,025 INFO L353 Elim1Store]: treesize reduction 19, result has 62.7 percent of original size [2022-01-18 16:39:33,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 53 treesize of output 66 [2022-01-18 16:39:33,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,103 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-01-18 16:39:33,103 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 52 [2022-01-18 16:39:33,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,118 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:39:33,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 131 treesize of output 103 [2022-01-18 16:39:33,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,142 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:39:33,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 1 [2022-01-18 16:39:33,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,177 INFO L353 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-01-18 16:39:33,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 85 [2022-01-18 16:39:33,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,220 INFO L353 Elim1Store]: treesize reduction 33, result has 35.3 percent of original size [2022-01-18 16:39:33,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 91 treesize of output 76 [2022-01-18 16:39:33,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,269 INFO L353 Elim1Store]: treesize reduction 10, result has 71.4 percent of original size [2022-01-18 16:39:33,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 56 [2022-01-18 16:39:33,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,393 INFO L353 Elim1Store]: treesize reduction 24, result has 31.4 percent of original size [2022-01-18 16:39:33,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 41 [2022-01-18 16:39:33,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 16:39:33,429 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 192 treesize of output 182 [2022-01-18 16:39:33,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,714 INFO L353 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2022-01-18 16:39:33,715 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 193 treesize of output 1 [2022-01-18 16:39:33,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,765 INFO L353 Elim1Store]: treesize reduction 37, result has 44.8 percent of original size [2022-01-18 16:39:33,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 433 treesize of output 322 [2022-01-18 16:39:33,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,972 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:39:33,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 1 [2022-01-18 16:39:33,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:33,991 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:39:33,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 1 [2022-01-18 16:39:33,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:34,004 INFO L353 Elim1Store]: treesize reduction 50, result has 2.0 percent of original size [2022-01-18 16:39:34,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 95 treesize of output 1 [2022-01-18 16:39:34,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:34,187 INFO L353 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2022-01-18 16:39:34,188 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 2 case distinctions, treesize of input 26 treesize of output 1 [2022-01-18 16:39:34,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:34,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 16:39:34,199 INFO L353 Elim1Store]: treesize reduction 34, result has 2.9 percent of original size [2022-01-18 16:39:34,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 46 treesize of output 1 [2022-01-18 16:39:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 16:39:34,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711457353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 16:39:34,259 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 16:39:34,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 36 [2022-01-18 16:39:34,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538332120] [2022-01-18 16:39:34,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 16:39:34,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-18 16:39:34,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 16:39:34,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-18 16:39:34,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=1064, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 16:39:34,260 INFO L87 Difference]: Start difference. First operand 9274 states and 33087 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-01-18 16:40:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-18 16:40:03,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 57 SyntacticMatches, 14 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14715 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=4209, Invalid=29097, Unknown=0, NotChecked=0, Total=33306 [2022-01-18 16:40:03,817 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 909 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 4909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2929 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 16:40:03,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 483 Invalid, 4909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1779 Invalid, 0 Unknown, 2929 Unchecked, 1.6s Time] [2022-01-18 16:40:03,818 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 16:40:03,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 16:40:03,848 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 16:40:03,848 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 [2022-01-18 16:40:04,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 16:40:04,032 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (9274states) and FLOYD_HOARE automaton (currently 163 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (16248 states constructed, input type IntersectNwa). [2022-01-18 16:40:04,033 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 16:40:04,033 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 16:40:04,033 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 16:40:04,035 INFO L732 BasicCegarLoop]: Path program histogram: [35, 3, 2, 1] [2022-01-18 16:40:04,037 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 16:40:04,037 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 16:40:04,038 INFO L202 PluginConnector]: Adding new model three-array-max.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 04:40:04 BasicIcfg [2022-01-18 16:40:04,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 16:40:04,038 INFO L158 Benchmark]: Toolchain (without parser) took 800514.95ms. Allocated memory was 335.5MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 295.4MB in the beginning and 644.6MB in the end (delta: -349.2MB). Peak memory consumption was 833.8MB. Max. memory is 16.0GB. [2022-01-18 16:40:04,038 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 335.5MB. Free memory is still 296.6MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 16:40:04,039 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.86ms. Allocated memory is still 335.5MB. Free memory was 295.4MB in the beginning and 293.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:40:04,039 INFO L158 Benchmark]: Boogie Preprocessor took 23.43ms. Allocated memory is still 335.5MB. Free memory was 293.9MB in the beginning and 292.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 16:40:04,039 INFO L158 Benchmark]: RCFGBuilder took 210.07ms. Allocated memory is still 335.5MB. Free memory was 292.9MB in the beginning and 283.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 16:40:04,039 INFO L158 Benchmark]: TraceAbstraction took 800254.67ms. Allocated memory was 335.5MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 282.5MB in the beginning and 644.6MB in the end (delta: -362.0MB). Peak memory consumption was 821.2MB. Max. memory is 16.0GB. [2022-01-18 16:40:04,039 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 335.5MB. Free memory is still 296.6MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.86ms. Allocated memory is still 335.5MB. Free memory was 295.4MB in the beginning and 293.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.43ms. Allocated memory is still 335.5MB. Free memory was 293.9MB in the beginning and 292.9MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 210.07ms. Allocated memory is still 335.5MB. Free memory was 292.9MB in the beginning and 283.0MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 800254.67ms. Allocated memory was 335.5MB in the beginning and 1.5GB in the end (delta: 1.2GB). Free memory was 282.5MB in the beginning and 644.6MB in the end (delta: -362.0MB). Peak memory consumption was 821.2MB. Max. memory is 16.0GB. * 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: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9274states) and FLOYD_HOARE automaton (currently 163 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (16248 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 67]: 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 (9274states) and FLOYD_HOARE automaton (currently 163 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (16248 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 68]: 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 (9274states) and FLOYD_HOARE automaton (currently 163 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (16248 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 67]: 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 (9274states) and FLOYD_HOARE automaton (currently 163 states, 37 states before enhancement),while ReachableStatesComputation was computing reachable states (16248 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 45 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 800.2s, OverallIterations: 41, TraceHistogramMax: 2, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.3s, AutomataDifference: 176.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10622 SdHoareTripleChecker+Valid, 27.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10622 mSDsluCounter, 8205 SdHoareTripleChecker+Invalid, 24.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17538 IncrementalHoareTripleChecker+Unchecked, 15789 mSDsCounter, 2040 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35418 IncrementalHoareTripleChecker+Invalid, 54996 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2040 mSolverCounterUnsat, 993 mSDtfsCounter, 35418 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3691 GetRequests, 1865 SyntacticMatches, 95 SemanticMatches, 1731 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58591 ImplicationChecksByTransitivity, 175.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9867occurred in iteration=39, InterpolantAutomatonStates: 1257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 4.2s AutomataMinimizationTime, 40 MinimizatonAttempts, 145076 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 609.4s InterpolantComputationTime, 2347 NumberOfCodeBlocks, 2347 NumberOfCodeBlocksAsserted, 121 NumberOfCheckSat, 3353 ConstructedInterpolants, 144 QuantifiedInterpolants, 327709 SizeOfPredicates, 274 NumberOfNonLiveVariables, 3055 ConjunctsInSsa, 791 ConjunctsInUnsatCore, 113 InterpolantComputations, 5 PerfectInterpolantSequences, 234/1115 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