/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:37:08,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:37:08,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:37:08,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:37:08,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-03 19:37:08,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-03 19:37:08,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-03 19:37:08,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-03 19:37:08,165 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:37:08,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:37:08,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:37:08,166 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:37:08,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:37:08,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:37:08,170 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:37:08,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:37:08,170 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:37:08,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:37:08,171 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:37:08,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:37:08,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:37:08,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:37:08,171 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:37:08,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:37:08,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:37:08,173 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:37:08,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:37:08,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:37:08,173 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:37:08,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:37:08,173 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:37:08,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:37:08,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:37:08,174 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:37:08,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:37:08,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:37:08,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:37:08,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:37:08,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:37:08,401 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:37:08,403 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:37:08,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl [2022-03-03 19:37:08,404 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/simple-array-sum.wvr.bpl' [2022-03-03 19:37:08,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:37:08,428 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:37:08,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:37:08,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:37:08,429 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:37:08,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,452 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:37:08,453 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:37:08,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:37:08,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:37:08,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:37:08,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:37:08,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:37:08,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:37:08,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:37:08,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/1) ... [2022-03-03 19:37:08,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:37:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:08,534 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:37:08,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:37:08,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:37:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:37:08,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:37:08,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:37:08,576 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:37:08,576 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:37:08,576 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:37:08,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:37:08,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:37:08,577 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-03 19:37:08,577 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-03 19:37:08,577 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-03 19:37:08,577 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:37:08,623 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:37:08,624 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:37:08,729 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:37:08,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:37:08,746 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:37:08,748 INFO L202 PluginConnector]: Adding new model simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:37:08 BoogieIcfgContainer [2022-03-03 19:37:08,748 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:37:08,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:37:08,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:37:08,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:37:08,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:37:08" (1/2) ... [2022-03-03 19:37:08,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e29a2d5 and model type simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:37:08, skipping insertion in model container [2022-03-03 19:37:08,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-array-sum.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:37:08" (2/2) ... [2022-03-03 19:37:08,756 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-array-sum.wvr.bpl [2022-03-03 19:37:08,760 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:37:08,760 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:37:08,761 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:37:08,761 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:37:08,805 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-03 19:37:08,840 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:37:08,845 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:37:08,845 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-03 19:37:08,868 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 29 transitions, 82 flow [2022-03-03 19:37:08,902 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:08,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:37:08,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:08,913 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:08,914 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:08,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:08,918 INFO L85 PathProgramCache]: Analyzing trace with hash 437584313, now seen corresponding path program 1 times [2022-03-03 19:37:08,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:08,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093709055] [2022-03-03 19:37:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:08,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:09,262 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:09,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093709055] [2022-03-03 19:37:09,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093709055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:37:09,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:37:09,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-03 19:37:09,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319128305] [2022-03-03 19:37:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:37:09,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-03 19:37:09,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:09,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-03 19:37:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:37:09,297 INFO L87 Difference]: Start difference. First operand has 131 states, 130 states have (on average 3.023076923076923) internal successors, (393), 130 states have internal predecessors, (393), 0 states have call successors, (0), 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 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:09,505 INFO L93 Difference]: Finished difference Result 257 states and 781 transitions. [2022-03-03 19:37:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:37:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:37:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:09,526 INFO L225 Difference]: With dead ends: 257 [2022-03-03 19:37:09,526 INFO L226 Difference]: Without dead ends: 230 [2022-03-03 19:37:09,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:09,531 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:09,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:09,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-03 19:37:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-03-03 19:37:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 3.0802139037433154) internal successors, (576), 187 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 576 transitions. [2022-03-03 19:37:09,581 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 576 transitions. Word has length 16 [2022-03-03 19:37:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:09,583 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 576 transitions. [2022-03-03 19:37:09,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 576 transitions. [2022-03-03 19:37:09,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:37:09,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:09,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:09,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:37:09,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -760695079, now seen corresponding path program 1 times [2022-03-03 19:37:09,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:09,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474013365] [2022-03-03 19:37:09,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:09,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:09,645 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:09,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474013365] [2022-03-03 19:37:09,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474013365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:09,645 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674431621] [2022-03-03 19:37:09,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:09,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:09,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:09,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:09,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:37:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:09,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:37:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:09,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:09,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:09,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674431621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:09,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:09,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-03 19:37:09,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036889828] [2022-03-03 19:37:09,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:09,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:37:09,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:37:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:37:09,890 INFO L87 Difference]: Start difference. First operand 188 states and 576 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-03-03 19:37:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:10,040 INFO L93 Difference]: Finished difference Result 376 states and 1113 transitions. [2022-03-03 19:37:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:37:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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 18 [2022-03-03 19:37:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:10,048 INFO L225 Difference]: With dead ends: 376 [2022-03-03 19:37:10,048 INFO L226 Difference]: Without dead ends: 376 [2022-03-03 19:37:10,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:10,053 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:10,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 36 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-03 19:37:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 181. [2022-03-03 19:37:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 3.077777777777778) internal successors, (554), 180 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 554 transitions. [2022-03-03 19:37:10,091 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 554 transitions. Word has length 18 [2022-03-03 19:37:10,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:10,091 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 554 transitions. [2022-03-03 19:37:10,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 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) [2022-03-03 19:37:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 554 transitions. [2022-03-03 19:37:10,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:37:10,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:10,093 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:10,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 19:37:10,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:10,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:10,295 INFO L85 PathProgramCache]: Analyzing trace with hash 663812563, now seen corresponding path program 2 times [2022-03-03 19:37:10,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:10,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000129478] [2022-03-03 19:37:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:10,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:10,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:10,331 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:10,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000129478] [2022-03-03 19:37:10,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000129478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:37:10,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:37:10,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:37:10,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827300170] [2022-03-03 19:37:10,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:37:10,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-03 19:37:10,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-03 19:37:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-03 19:37:10,336 INFO L87 Difference]: Start difference. First operand 181 states and 554 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:10,403 INFO L93 Difference]: Finished difference Result 221 states and 644 transitions. [2022-03-03 19:37:10,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-03 19:37:10,403 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:37:10,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:10,405 INFO L225 Difference]: With dead ends: 221 [2022-03-03 19:37:10,405 INFO L226 Difference]: Without dead ends: 190 [2022-03-03 19:37:10,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-03 19:37:10,406 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:10,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-03 19:37:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2022-03-03 19:37:10,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 3.0297619047619047) internal successors, (509), 168 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 509 transitions. [2022-03-03 19:37:10,426 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 509 transitions. Word has length 18 [2022-03-03 19:37:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:10,426 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 509 transitions. [2022-03-03 19:37:10,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 509 transitions. [2022-03-03 19:37:10,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-03 19:37:10,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:10,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:10,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:37:10,428 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:10,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:10,428 INFO L85 PathProgramCache]: Analyzing trace with hash 132805511, now seen corresponding path program 1 times [2022-03-03 19:37:10,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:10,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994295537] [2022-03-03 19:37:10,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:10,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:10,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:10,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994295537] [2022-03-03 19:37:10,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994295537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:37:10,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:37:10,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 19:37:10,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919635657] [2022-03-03 19:37:10,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:37:10,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:37:10,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:37:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:37:10,465 INFO L87 Difference]: Start difference. First operand 169 states and 509 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:10,485 INFO L93 Difference]: Finished difference Result 239 states and 717 transitions. [2022-03-03 19:37:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:37:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-03 19:37:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:10,487 INFO L225 Difference]: With dead ends: 239 [2022-03-03 19:37:10,487 INFO L226 Difference]: Without dead ends: 203 [2022-03-03 19:37:10,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:37:10,488 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:10,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:37:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-03 19:37:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-03 19:37:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 3.0247524752475248) internal successors, (611), 202 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 611 transitions. [2022-03-03 19:37:10,504 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 611 transitions. Word has length 19 [2022-03-03 19:37:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:10,504 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 611 transitions. [2022-03-03 19:37:10,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 611 transitions. [2022-03-03 19:37:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-03 19:37:10,506 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:10,507 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:10,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:37:10,507 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1705332901, now seen corresponding path program 1 times [2022-03-03 19:37:10,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:10,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222771297] [2022-03-03 19:37:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:10,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:10,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:10,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222771297] [2022-03-03 19:37:10,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222771297] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:10,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481738984] [2022-03-03 19:37:10,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:10,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:10,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:10,576 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:10,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:37:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:10,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-03 19:37:10,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:10,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:10,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481738984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:10,699 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:10,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2022-03-03 19:37:10,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403083097] [2022-03-03 19:37:10,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:37:10,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:37:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:37:10,701 INFO L87 Difference]: Start difference. First operand 203 states and 611 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:10,785 INFO L93 Difference]: Finished difference Result 263 states and 798 transitions. [2022-03-03 19:37:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:37:10,785 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-03 19:37:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:10,787 INFO L225 Difference]: With dead ends: 263 [2022-03-03 19:37:10,787 INFO L226 Difference]: Without dead ends: 263 [2022-03-03 19:37:10,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:10,788 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:10,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:10,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-03 19:37:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 215. [2022-03-03 19:37:10,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 3.0233644859813085) internal successors, (647), 214 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 647 transitions. [2022-03-03 19:37:10,797 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 647 transitions. Word has length 21 [2022-03-03 19:37:10,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:10,798 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 647 transitions. [2022-03-03 19:37:10,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:10,798 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 647 transitions. [2022-03-03 19:37:10,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:37:10,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:10,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:10,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-03 19:37:11,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:11,016 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:11,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash 946505877, now seen corresponding path program 1 times [2022-03-03 19:37:11,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:11,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918445333] [2022-03-03 19:37:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:11,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:11,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:11,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918445333] [2022-03-03 19:37:11,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918445333] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:11,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036699936] [2022-03-03 19:37:11,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:11,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:11,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:11,191 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:11,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:37:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:11,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:37:11,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:11,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-03 19:37:11,540 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 11 treesize of output 10 [2022-03-03 19:37:11,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:37:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:11,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:11,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-03-03 19:37:11,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:11,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:11,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:37:11,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-03-03 19:37:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:11,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036699936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:11,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:11,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:37:11,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866905715] [2022-03-03 19:37:11,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:11,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:37:11,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:11,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:37:11,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:37:11,951 INFO L87 Difference]: Start difference. First operand 215 states and 647 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:12,244 INFO L93 Difference]: Finished difference Result 425 states and 1255 transitions. [2022-03-03 19:37:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:37:12,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:37:12,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:12,247 INFO L225 Difference]: With dead ends: 425 [2022-03-03 19:37:12,247 INFO L226 Difference]: Without dead ends: 398 [2022-03-03 19:37:12,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:37:12,248 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:12,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:37:12,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-03 19:37:12,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 294. [2022-03-03 19:37:12,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.9829351535836177) internal successors, (874), 293 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 874 transitions. [2022-03-03 19:37:12,259 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 874 transitions. Word has length 23 [2022-03-03 19:37:12,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:12,263 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 874 transitions. [2022-03-03 19:37:12,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 874 transitions. [2022-03-03 19:37:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:37:12,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:12,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:12,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:12,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:12,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:12,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash 615894917, now seen corresponding path program 2 times [2022-03-03 19:37:12,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:12,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221734308] [2022-03-03 19:37:12,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:12,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:12,640 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:12,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221734308] [2022-03-03 19:37:12,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221734308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:12,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335385761] [2022-03-03 19:37:12,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:12,642 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:12,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:37:12,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:12,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:37:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:12,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-03-03 19:37:12,830 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 11 treesize of output 10 [2022-03-03 19:37:12,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:37:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:13,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-03-03 19:37:13,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:13,174 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:13,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 18 [2022-03-03 19:37:13,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-03-03 19:37:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:13,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335385761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:13,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:13,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 19:37:13,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138493721] [2022-03-03 19:37:13,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:13,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:37:13,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:37:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:37:13,293 INFO L87 Difference]: Start difference. First operand 294 states and 874 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:14,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:14,260 INFO L93 Difference]: Finished difference Result 820 states and 2540 transitions. [2022-03-03 19:37:14,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-03 19:37:14,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:37:14,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:14,265 INFO L225 Difference]: With dead ends: 820 [2022-03-03 19:37:14,265 INFO L226 Difference]: Without dead ends: 793 [2022-03-03 19:37:14,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:37:14,266 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 224 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:14,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 135 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:37:14,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-03-03 19:37:14,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 314. [2022-03-03 19:37:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 3.073482428115016) internal successors, (962), 313 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 962 transitions. [2022-03-03 19:37:14,282 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 962 transitions. Word has length 23 [2022-03-03 19:37:14,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:14,282 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 962 transitions. [2022-03-03 19:37:14,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:14,282 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 962 transitions. [2022-03-03 19:37:14,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:37:14,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:14,284 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:14,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:14,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:14,484 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1351743519, now seen corresponding path program 3 times [2022-03-03 19:37:14,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:14,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959235645] [2022-03-03 19:37:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:14,638 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:14,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959235645] [2022-03-03 19:37:14,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959235645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:14,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513559257] [2022-03-03 19:37:14,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:14,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:14,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:14,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:14,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:37:14,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:37:14,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:37:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:14,792 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 10 treesize of output 9 [2022-03-03 19:37:14,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:37:14,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-03-03 19:37:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:14,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:15,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:15,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-03-03 19:37:15,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-03-03 19:37:15,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-03 19:37:15,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:15,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513559257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:15,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:15,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 19:37:15,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990927188] [2022-03-03 19:37:15,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:15,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:37:15,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:37:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:37:15,306 INFO L87 Difference]: Start difference. First operand 314 states and 962 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:15,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:15,712 INFO L93 Difference]: Finished difference Result 582 states and 1803 transitions. [2022-03-03 19:37:15,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-03 19:37:15,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 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 23 [2022-03-03 19:37:15,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:15,716 INFO L225 Difference]: With dead ends: 582 [2022-03-03 19:37:15,716 INFO L226 Difference]: Without dead ends: 555 [2022-03-03 19:37:15,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:37:15,717 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 102 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:15,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 102 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:37:15,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-03-03 19:37:15,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 366. [2022-03-03 19:37:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 3.084931506849315) internal successors, (1126), 365 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:15,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1126 transitions. [2022-03-03 19:37:15,729 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1126 transitions. Word has length 23 [2022-03-03 19:37:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:15,729 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1126 transitions. [2022-03-03 19:37:15,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1126 transitions. [2022-03-03 19:37:15,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-03 19:37:15,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:15,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:37:15,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:15,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:15,954 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:15,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash -68708093, now seen corresponding path program 4 times [2022-03-03 19:37:15,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:15,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542730554] [2022-03-03 19:37:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:15,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:16,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:16,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542730554] [2022-03-03 19:37:16,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542730554] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:16,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553985270] [2022-03-03 19:37:16,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:16,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:16,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:16,111 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:16,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:37:16,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:16,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:16,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:37:16,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:16,259 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 10 treesize of output 9 [2022-03-03 19:37:16,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-03-03 19:37:16,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-03 19:37:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:16,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:16,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:16,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2022-03-03 19:37:16,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-03-03 19:37:16,609 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 19 treesize of output 15 [2022-03-03 19:37:16,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:16,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553985270] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:16,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:16,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-03 19:37:16,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465501996] [2022-03-03 19:37:16,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:16,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-03 19:37:16,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-03 19:37:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-03-03 19:37:16,761 INFO L87 Difference]: Start difference. First operand 366 states and 1126 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:17,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:17,639 INFO L93 Difference]: Finished difference Result 1010 states and 3145 transitions. [2022-03-03 19:37:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:37:17,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-03 19:37:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:17,645 INFO L225 Difference]: With dead ends: 1010 [2022-03-03 19:37:17,645 INFO L226 Difference]: Without dead ends: 956 [2022-03-03 19:37:17,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:37:17,646 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 193 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:17,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 109 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:37:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-03-03 19:37:17,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 406. [2022-03-03 19:37:17,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1703703703703705) internal successors, (1284), 405 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:17,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1284 transitions. [2022-03-03 19:37:17,663 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1284 transitions. Word has length 23 [2022-03-03 19:37:17,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:17,663 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1284 transitions. [2022-03-03 19:37:17,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:17,663 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1284 transitions. [2022-03-03 19:37:17,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:37:17,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:17,665 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] [2022-03-03 19:37:17,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:17,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:17,887 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash 784698867, now seen corresponding path program 5 times [2022-03-03 19:37:17,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:17,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406786518] [2022-03-03 19:37:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:17,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:17,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406786518] [2022-03-03 19:37:17,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406786518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:17,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277798380] [2022-03-03 19:37:17,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:17,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:17,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:17,930 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:17,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:37:17,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:37:17,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:37:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:18,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:18,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277798380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:18,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:18,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-03 19:37:18,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590701756] [2022-03-03 19:37:18,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:18,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-03 19:37:18,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:18,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-03 19:37:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-03 19:37:18,098 INFO L87 Difference]: Start difference. First operand 406 states and 1284 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:18,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:18,240 INFO L93 Difference]: Finished difference Result 909 states and 2785 transitions. [2022-03-03 19:37:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-03 19:37:18,240 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:37:18,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:18,245 INFO L225 Difference]: With dead ends: 909 [2022-03-03 19:37:18,245 INFO L226 Difference]: Without dead ends: 909 [2022-03-03 19:37:18,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:37:18,246 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:18,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 69 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2022-03-03 19:37:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 460. [2022-03-03 19:37:18,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 3.252723311546841) internal successors, (1493), 459 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:18,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1493 transitions. [2022-03-03 19:37:18,263 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1493 transitions. Word has length 25 [2022-03-03 19:37:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:18,264 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1493 transitions. [2022-03-03 19:37:18,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1493 transitions. [2022-03-03 19:37:18,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:37:18,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:18,266 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] [2022-03-03 19:37:18,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:18,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:18,479 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:18,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash -817798605, now seen corresponding path program 6 times [2022-03-03 19:37:18,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:18,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328792085] [2022-03-03 19:37:18,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:18,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:18,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:18,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328792085] [2022-03-03 19:37:18,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328792085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:18,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274169639] [2022-03-03 19:37:18,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:18,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:18,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:18,521 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:18,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:37:18,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:37:18,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:18,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:37:18,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:18,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:18,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274169639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:18,678 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:18,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-03 19:37:18,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503492463] [2022-03-03 19:37:18,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:18,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-03 19:37:18,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:18,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-03 19:37:18,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:37:18,680 INFO L87 Difference]: Start difference. First operand 460 states and 1493 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:19,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:19,655 INFO L93 Difference]: Finished difference Result 2206 states and 6830 transitions. [2022-03-03 19:37:19,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:37:19,655 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:37:19,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:19,667 INFO L225 Difference]: With dead ends: 2206 [2022-03-03 19:37:19,667 INFO L226 Difference]: Without dead ends: 2206 [2022-03-03 19:37:19,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=677, Invalid=2745, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:37:19,669 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 440 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:19,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 125 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:37:19,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2206 states. [2022-03-03 19:37:19,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2206 to 841. [2022-03-03 19:37:19,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 3.5) internal successors, (2940), 840 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 2940 transitions. [2022-03-03 19:37:19,705 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 2940 transitions. Word has length 25 [2022-03-03 19:37:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:19,705 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 2940 transitions. [2022-03-03 19:37:19,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 2940 transitions. [2022-03-03 19:37:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:37:19,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:19,708 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] [2022-03-03 19:37:19,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-03 19:37:19,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-03 19:37:19,924 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:19,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash 136398371, now seen corresponding path program 7 times [2022-03-03 19:37:19,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:19,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101079292] [2022-03-03 19:37:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:19,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:19,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:19,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101079292] [2022-03-03 19:37:19,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101079292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:19,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192245517] [2022-03-03 19:37:19,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:19,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:19,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:19,960 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:19,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:37:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:19,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:37:19,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:20,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:20,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192245517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:20,077 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:20,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-03 19:37:20,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054288452] [2022-03-03 19:37:20,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:20,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:37:20,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:37:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:37:20,079 INFO L87 Difference]: Start difference. First operand 841 states and 2940 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:20,179 INFO L93 Difference]: Finished difference Result 1241 states and 4180 transitions. [2022-03-03 19:37:20,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:37:20,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:37:20,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:20,186 INFO L225 Difference]: With dead ends: 1241 [2022-03-03 19:37:20,186 INFO L226 Difference]: Without dead ends: 1235 [2022-03-03 19:37:20,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-03 19:37:20,187 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:20,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 41 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:37:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2022-03-03 19:37:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 840. [2022-03-03 19:37:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.4803337306317044) internal successors, (2920), 839 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:20,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2920 transitions. [2022-03-03 19:37:20,215 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2920 transitions. Word has length 25 [2022-03-03 19:37:20,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:20,215 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2920 transitions. [2022-03-03 19:37:20,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:20,215 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2920 transitions. [2022-03-03 19:37:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-03 19:37:20,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:20,218 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] [2022-03-03 19:37:20,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:20,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:20,431 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:20,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:20,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1382698947, now seen corresponding path program 8 times [2022-03-03 19:37:20,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:20,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798373937] [2022-03-03 19:37:20,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:20,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:20,470 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:20,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798373937] [2022-03-03 19:37:20,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798373937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:20,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023569467] [2022-03-03 19:37:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:20,472 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:20,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:37:20,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:20,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:20,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:37:20,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:20,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:20,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023569467] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:20,605 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:20,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-03 19:37:20,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972856991] [2022-03-03 19:37:20,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:20,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:20,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:20,607 INFO L87 Difference]: Start difference. First operand 840 states and 2920 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:21,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:21,025 INFO L93 Difference]: Finished difference Result 2629 states and 9167 transitions. [2022-03-03 19:37:21,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:37:21,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-03 19:37:21,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:21,039 INFO L225 Difference]: With dead ends: 2629 [2022-03-03 19:37:21,040 INFO L226 Difference]: Without dead ends: 2587 [2022-03-03 19:37:21,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=812, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:37:21,041 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 341 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:21,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 60 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:37:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2022-03-03 19:37:21,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1338. [2022-03-03 19:37:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1338 states, 1337 states have (on average 3.6738967838444276) internal successors, (4912), 1337 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1338 states to 1338 states and 4912 transitions. [2022-03-03 19:37:21,093 INFO L78 Accepts]: Start accepts. Automaton has 1338 states and 4912 transitions. Word has length 25 [2022-03-03 19:37:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:21,093 INFO L470 AbstractCegarLoop]: Abstraction has 1338 states and 4912 transitions. [2022-03-03 19:37:21,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1338 states and 4912 transitions. [2022-03-03 19:37:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:37:21,097 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:21,097 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] [2022-03-03 19:37:21,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:21,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:37:21,320 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:21,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:21,320 INFO L85 PathProgramCache]: Analyzing trace with hash 849469189, now seen corresponding path program 9 times [2022-03-03 19:37:21,320 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:21,320 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587809731] [2022-03-03 19:37:21,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:21,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:21,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587809731] [2022-03-03 19:37:21,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587809731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:21,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064437077] [2022-03-03 19:37:21,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:21,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:21,357 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:21,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:37:21,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:37:21,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:21,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:37:21,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:21,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:21,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:21,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064437077] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:21,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:21,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-03 19:37:21,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463793316] [2022-03-03 19:37:21,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:21,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:21,487 INFO L87 Difference]: Start difference. First operand 1338 states and 4912 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:21,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:21,860 INFO L93 Difference]: Finished difference Result 2926 states and 9834 transitions. [2022-03-03 19:37:21,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:37:21,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 26 [2022-03-03 19:37:21,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:21,874 INFO L225 Difference]: With dead ends: 2926 [2022-03-03 19:37:21,874 INFO L226 Difference]: Without dead ends: 2537 [2022-03-03 19:37:21,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=703, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:37:21,875 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:21,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 101 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:37:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2537 states. [2022-03-03 19:37:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2537 to 1717. [2022-03-03 19:37:21,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1716 states have (on average 3.518065268065268) internal successors, (6037), 1716 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:21,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 6037 transitions. [2022-03-03 19:37:21,927 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 6037 transitions. Word has length 26 [2022-03-03 19:37:21,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:21,928 INFO L470 AbstractCegarLoop]: Abstraction has 1717 states and 6037 transitions. [2022-03-03 19:37:21,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:21,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 6037 transitions. [2022-03-03 19:37:21,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:37:21,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:21,933 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] [2022-03-03 19:37:21,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:22,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:37:22,147 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1971117019, now seen corresponding path program 10 times [2022-03-03 19:37:22,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:22,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843596811] [2022-03-03 19:37:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:22,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:22,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:22,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843596811] [2022-03-03 19:37:22,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843596811] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:22,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374770478] [2022-03-03 19:37:22,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:22,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:22,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:22,184 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:22,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:37:22,213 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:22,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:22,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:37:22,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:22,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:37:22,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374770478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:22,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:22,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-03 19:37:22,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636701357] [2022-03-03 19:37:22,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:22,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:22,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:22,323 INFO L87 Difference]: Start difference. First operand 1717 states and 6037 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:22,818 INFO L93 Difference]: Finished difference Result 7005 states and 23425 transitions. [2022-03-03 19:37:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:37:22,818 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:37:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:22,848 INFO L225 Difference]: With dead ends: 7005 [2022-03-03 19:37:22,848 INFO L226 Difference]: Without dead ends: 6920 [2022-03-03 19:37:22,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=846, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:37:22,849 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 308 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:22,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 128 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:37:22,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6920 states. [2022-03-03 19:37:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6920 to 3961. [2022-03-03 19:37:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3961 states, 3960 states have (on average 3.6626262626262625) internal successors, (14504), 3960 states have internal predecessors, (14504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3961 states to 3961 states and 14504 transitions. [2022-03-03 19:37:23,014 INFO L78 Accepts]: Start accepts. Automaton has 3961 states and 14504 transitions. Word has length 28 [2022-03-03 19:37:23,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:23,015 INFO L470 AbstractCegarLoop]: Abstraction has 3961 states and 14504 transitions. [2022-03-03 19:37:23,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3961 states and 14504 transitions. [2022-03-03 19:37:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:37:23,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:23,025 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] [2022-03-03 19:37:23,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:23,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:37:23,243 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:23,244 INFO L85 PathProgramCache]: Analyzing trace with hash -191772803, now seen corresponding path program 11 times [2022-03-03 19:37:23,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:23,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970016618] [2022-03-03 19:37:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:23,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:23,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:23,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970016618] [2022-03-03 19:37:23,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970016618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:23,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106776179] [2022-03-03 19:37:23,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:23,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:23,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:23,286 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:23,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:37:23,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:37:23,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:23,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-03 19:37:23,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:23,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:23,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106776179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:23,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:23,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 8 [2022-03-03 19:37:23,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317293254] [2022-03-03 19:37:23,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:23,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:23,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:23,436 INFO L87 Difference]: Start difference. First operand 3961 states and 14504 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:23,669 INFO L93 Difference]: Finished difference Result 7306 states and 25843 transitions. [2022-03-03 19:37:23,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:37:23,669 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:37:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:23,695 INFO L225 Difference]: With dead ends: 7306 [2022-03-03 19:37:23,695 INFO L226 Difference]: Without dead ends: 7222 [2022-03-03 19:37:23,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:37:23,696 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 131 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:23,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 75 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:37:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7222 states. [2022-03-03 19:37:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7222 to 5516. [2022-03-03 19:37:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5516 states, 5515 states have (on average 3.7071622846781507) internal successors, (20445), 5515 states have internal predecessors, (20445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5516 states to 5516 states and 20445 transitions. [2022-03-03 19:37:23,936 INFO L78 Accepts]: Start accepts. Automaton has 5516 states and 20445 transitions. Word has length 28 [2022-03-03 19:37:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:23,937 INFO L470 AbstractCegarLoop]: Abstraction has 5516 states and 20445 transitions. [2022-03-03 19:37:23,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 5516 states and 20445 transitions. [2022-03-03 19:37:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:37:23,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:23,952 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] [2022-03-03 19:37:23,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:24,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:37:24,167 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash -489727391, now seen corresponding path program 12 times [2022-03-03 19:37:24,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:24,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126707294] [2022-03-03 19:37:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:24,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:24,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126707294] [2022-03-03 19:37:24,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126707294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:24,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224504168] [2022-03-03 19:37:24,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:24,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:24,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:24,201 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:24,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:37:24,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:37:24,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:24,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:37:24,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:24,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:24,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224504168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:24,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:24,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-03 19:37:24,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479372418] [2022-03-03 19:37:24,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:24,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:37:24,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:37:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:37:24,338 INFO L87 Difference]: Start difference. First operand 5516 states and 20445 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:24,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:24,796 INFO L93 Difference]: Finished difference Result 8819 states and 29845 transitions. [2022-03-03 19:37:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:37:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:37:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:24,832 INFO L225 Difference]: With dead ends: 8819 [2022-03-03 19:37:24,832 INFO L226 Difference]: Without dead ends: 8707 [2022-03-03 19:37:24,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:37:24,834 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 248 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:24,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 143 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:37:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8707 states. [2022-03-03 19:37:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8707 to 6491. [2022-03-03 19:37:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6490 states have (on average 3.6280431432973805) internal successors, (23546), 6490 states have internal predecessors, (23546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 23546 transitions. [2022-03-03 19:37:25,090 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 23546 transitions. Word has length 28 [2022-03-03 19:37:25,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:25,090 INFO L470 AbstractCegarLoop]: Abstraction has 6491 states and 23546 transitions. [2022-03-03 19:37:25,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:25,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 23546 transitions. [2022-03-03 19:37:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:25,110 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:25,110 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] [2022-03-03 19:37:25,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:25,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:25,323 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash -655766583, now seen corresponding path program 13 times [2022-03-03 19:37:25,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:25,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664388526] [2022-03-03 19:37:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:25,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:25,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:25,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:25,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664388526] [2022-03-03 19:37:25,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664388526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:25,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388697854] [2022-03-03 19:37:25,713 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:37:25,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:25,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:25,716 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:25,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:37:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:25,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:25,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:26,036 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 14 treesize of output 13 [2022-03-03 19:37:26,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:26,184 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 27 treesize of output 27 [2022-03-03 19:37:26,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-03-03 19:37:26,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-03 19:37:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:26,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:26,487 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:37:26,487 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 458 treesize of output 426 [2022-03-03 19:37:26,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:26,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:26,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:26,767 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:37:26,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-03 19:37:26,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:26,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:26,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:26,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:37:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:26,910 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388697854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:26,910 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:26,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2022-03-03 19:37:26,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536459927] [2022-03-03 19:37:26,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:26,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:37:26,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:37:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:37:26,912 INFO L87 Difference]: Start difference. First operand 6491 states and 23546 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) [2022-03-03 19:37:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:29,139 INFO L93 Difference]: Finished difference Result 13830 states and 48778 transitions. [2022-03-03 19:37:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:37:29,140 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 30 [2022-03-03 19:37:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:29,190 INFO L225 Difference]: With dead ends: 13830 [2022-03-03 19:37:29,190 INFO L226 Difference]: Without dead ends: 13788 [2022-03-03 19:37:29,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:37:29,191 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 292 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1938 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 2311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:29,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 357 Invalid, 2311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1938 Invalid, 0 Unknown, 333 Unchecked, 1.1s Time] [2022-03-03 19:37:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2022-03-03 19:37:29,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 6636. [2022-03-03 19:37:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6636 states, 6635 states have (on average 3.619894498869631) internal successors, (24018), 6635 states have internal predecessors, (24018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6636 states to 6636 states and 24018 transitions. [2022-03-03 19:37:29,450 INFO L78 Accepts]: Start accepts. Automaton has 6636 states and 24018 transitions. Word has length 30 [2022-03-03 19:37:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:29,450 INFO L470 AbstractCegarLoop]: Abstraction has 6636 states and 24018 transitions. [2022-03-03 19:37:29,450 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) [2022-03-03 19:37:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6636 states and 24018 transitions. [2022-03-03 19:37:29,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:29,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:29,466 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] [2022-03-03 19:37:29,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-03 19:37:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-03 19:37:29,688 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2048908809, now seen corresponding path program 14 times [2022-03-03 19:37:29,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:29,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735771282] [2022-03-03 19:37:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:29,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:30,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735771282] [2022-03-03 19:37:30,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735771282] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:30,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255544322] [2022-03-03 19:37:30,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:37:30,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:30,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:30,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:30,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:37:30,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:37:30,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:30,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:30,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:30,424 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 14 treesize of output 13 [2022-03-03 19:37:30,501 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 [2022-03-03 19:37:30,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-03-03 19:37:30,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-03-03 19:37:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:30,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:30,801 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:37:30,802 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 1878 treesize of output 1782 [2022-03-03 19:37:31,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:31,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:31,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:31,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:32,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:32,092 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:37:32,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-03 19:37:32,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:32,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:32,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:32,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:37:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:32,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255544322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:32,236 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:32,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 29 [2022-03-03 19:37:32,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639178855] [2022-03-03 19:37:32,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:32,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:37:32,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:37:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:37:32,237 INFO L87 Difference]: Start difference. First operand 6636 states and 24018 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:35,069 INFO L93 Difference]: Finished difference Result 13741 states and 48255 transitions. [2022-03-03 19:37:35,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:37:35,070 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:37:35,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:35,111 INFO L225 Difference]: With dead ends: 13741 [2022-03-03 19:37:35,111 INFO L226 Difference]: Without dead ends: 13699 [2022-03-03 19:37:35,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=460, Invalid=3200, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:37:35,113 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 315 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 2307 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 2358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:35,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 353 Invalid, 2358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2307 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-03 19:37:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13699 states. [2022-03-03 19:37:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13699 to 6695. [2022-03-03 19:37:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 3.6118912458918433) internal successors, (24178), 6694 states have internal predecessors, (24178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 24178 transitions. [2022-03-03 19:37:35,357 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 24178 transitions. Word has length 30 [2022-03-03 19:37:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:35,358 INFO L470 AbstractCegarLoop]: Abstraction has 6695 states and 24178 transitions. [2022-03-03 19:37:35,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 24178 transitions. [2022-03-03 19:37:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:35,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:35,374 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] [2022-03-03 19:37:35,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:35,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:35,597 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1054839645, now seen corresponding path program 15 times [2022-03-03 19:37:35,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:35,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020714116] [2022-03-03 19:37:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:35,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:35,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020714116] [2022-03-03 19:37:35,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020714116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:35,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354997155] [2022-03-03 19:37:35,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:37:35,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:35,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:35,873 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:35,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:37:35,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:37:35,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:35,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:35,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:36,078 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 10 treesize of output 9 [2022-03-03 19:37:36,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:36,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:36,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-03-03 19:37:36,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:36,383 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 31 treesize of output 31 [2022-03-03 19:37:36,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-03-03 19:37:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:36,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:36,785 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:37:36,785 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 1866 treesize of output 1770 [2022-03-03 19:37:36,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:36,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:36,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:36,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:37,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:37,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:37,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:37,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 19:37:37,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:37,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:37,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:37,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:37:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:37,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354997155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:37,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:37,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 19:37:37,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956975079] [2022-03-03 19:37:37,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:37,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:37:37,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:37,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:37:37,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:37:37,268 INFO L87 Difference]: Start difference. First operand 6695 states and 24178 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) [2022-03-03 19:37:39,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:39,370 INFO L93 Difference]: Finished difference Result 16566 states and 56696 transitions. [2022-03-03 19:37:39,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:37:39,370 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 30 [2022-03-03 19:37:39,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:39,412 INFO L225 Difference]: With dead ends: 16566 [2022-03-03 19:37:39,412 INFO L226 Difference]: Without dead ends: 16482 [2022-03-03 19:37:39,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=436, Invalid=3470, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 19:37:39,413 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 356 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:39,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 285 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1296 Invalid, 0 Unknown, 260 Unchecked, 0.8s Time] [2022-03-03 19:37:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2022-03-03 19:37:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 7235. [2022-03-03 19:37:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7235 states, 7234 states have (on average 3.6300801769422173) internal successors, (26260), 7234 states have internal predecessors, (26260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:39,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7235 states to 7235 states and 26260 transitions. [2022-03-03 19:37:39,649 INFO L78 Accepts]: Start accepts. Automaton has 7235 states and 26260 transitions. Word has length 30 [2022-03-03 19:37:39,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:39,650 INFO L470 AbstractCegarLoop]: Abstraction has 7235 states and 26260 transitions. [2022-03-03 19:37:39,650 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) [2022-03-03 19:37:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 7235 states and 26260 transitions. [2022-03-03 19:37:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:39,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:39,666 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] [2022-03-03 19:37:39,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:39,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:39,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:39,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:39,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1811677887, now seen corresponding path program 16 times [2022-03-03 19:37:39,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:39,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671382817] [2022-03-03 19:37:39,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:39,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:40,186 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:40,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:40,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671382817] [2022-03-03 19:37:40,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671382817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:40,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516419521] [2022-03-03 19:37:40,186 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:37:40,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:40,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:40,187 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:40,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:37:40,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:37:40,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:40,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:37:40,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:40,482 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 10 treesize of output 9 [2022-03-03 19:37:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:40,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:40,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-03-03 19:37:40,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:40,694 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 49 treesize of output 45 [2022-03-03 19:37:40,807 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 55 treesize of output 35 [2022-03-03 19:37:40,877 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:40,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:41,048 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:37:41,048 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 1878 treesize of output 1782 [2022-03-03 19:37:41,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:41,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:41,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:41,543 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:37:41,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-03 19:37:41,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:41,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:41,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:41,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:37:41,672 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:41,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516419521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:41,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:41,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 19:37:41,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890063822] [2022-03-03 19:37:41,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:41,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:37:41,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:41,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:37:41,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:37:41,674 INFO L87 Difference]: Start difference. First operand 7235 states and 26260 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) [2022-03-03 19:37:42,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:42,553 INFO L93 Difference]: Finished difference Result 15739 states and 55669 transitions. [2022-03-03 19:37:42,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-03 19:37:42,554 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 30 [2022-03-03 19:37:42,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:42,589 INFO L225 Difference]: With dead ends: 15739 [2022-03-03 19:37:42,589 INFO L226 Difference]: Without dead ends: 15712 [2022-03-03 19:37:42,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-03 19:37:42,590 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 180 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 473 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:42,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 243 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1076 Invalid, 0 Unknown, 473 Unchecked, 0.5s Time] [2022-03-03 19:37:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15712 states. [2022-03-03 19:37:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15712 to 7238. [2022-03-03 19:37:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7238 states, 7237 states have (on average 3.630233522177698) internal successors, (26272), 7237 states have internal predecessors, (26272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7238 states to 7238 states and 26272 transitions. [2022-03-03 19:37:42,818 INFO L78 Accepts]: Start accepts. Automaton has 7238 states and 26272 transitions. Word has length 30 [2022-03-03 19:37:42,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:42,819 INFO L470 AbstractCegarLoop]: Abstraction has 7238 states and 26272 transitions. [2022-03-03 19:37:42,819 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) [2022-03-03 19:37:42,819 INFO L276 IsEmpty]: Start isEmpty. Operand 7238 states and 26272 transitions. [2022-03-03 19:37:42,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:42,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:42,832 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] [2022-03-03 19:37:42,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-03 19:37:43,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:43,034 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:43,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1682132343, now seen corresponding path program 17 times [2022-03-03 19:37:43,034 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:43,034 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473094838] [2022-03-03 19:37:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:43,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:43,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:43,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:43,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473094838] [2022-03-03 19:37:43,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473094838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:43,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766059107] [2022-03-03 19:37:43,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:37:43,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:43,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:43,255 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:43,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:37:43,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:37:43,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:43,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-03 19:37:43,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:43,470 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 10 treesize of output 9 [2022-03-03 19:37:43,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:43,584 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-03 19:37:43,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 34 [2022-03-03 19:37:43,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:43,592 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 37 [2022-03-03 19:37:43,698 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 46 treesize of output 30 [2022-03-03 19:37:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:43,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:44,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:44,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:44,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:44,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:44,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 19:37:44,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:44,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:37:44,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:44,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:37:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:44,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766059107] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:37:44,361 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:37:44,361 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 27 [2022-03-03 19:37:44,361 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345794723] [2022-03-03 19:37:44,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:37:44,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-03 19:37:44,362 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:37:44,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-03 19:37:44,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:37:44,363 INFO L87 Difference]: Start difference. First operand 7238 states and 26272 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:49,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:37:49,910 INFO L93 Difference]: Finished difference Result 11143 states and 38720 transitions. [2022-03-03 19:37:49,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-03 19:37:49,911 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:37:49,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:37:49,942 INFO L225 Difference]: With dead ends: 11143 [2022-03-03 19:37:49,942 INFO L226 Difference]: Without dead ends: 11059 [2022-03-03 19:37:49,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1414, Invalid=10358, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 19:37:49,946 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 318 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:37:49,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 573 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2262 Invalid, 0 Unknown, 216 Unchecked, 1.3s Time] [2022-03-03 19:37:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11059 states. [2022-03-03 19:37:50,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11059 to 7638. [2022-03-03 19:37:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7638 states, 7637 states have (on average 3.646458033259133) internal successors, (27848), 7637 states have internal predecessors, (27848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7638 states to 7638 states and 27848 transitions. [2022-03-03 19:37:50,132 INFO L78 Accepts]: Start accepts. Automaton has 7638 states and 27848 transitions. Word has length 30 [2022-03-03 19:37:50,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:37:50,132 INFO L470 AbstractCegarLoop]: Abstraction has 7638 states and 27848 transitions. [2022-03-03 19:37:50,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:37:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7638 states and 27848 transitions. [2022-03-03 19:37:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:37:50,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:37:50,146 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] [2022-03-03 19:37:50,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:37:50,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:50,347 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:37:50,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:37:50,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1060251933, now seen corresponding path program 18 times [2022-03-03 19:37:50,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:37:50,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661625909] [2022-03-03 19:37:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:37:50,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:37:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:37:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:50,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:37:50,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661625909] [2022-03-03 19:37:50,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661625909] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:37:50,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14584533] [2022-03-03 19:37:50,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:37:50,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:37:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:37:50,568 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:37:50,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:37:50,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:37:50,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:37:50,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:37:50,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:37:50,798 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 14 treesize of output 13 [2022-03-03 19:37:50,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:50,918 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-03 19:37:50,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 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 34 [2022-03-03 19:37:50,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:37:50,923 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 37 [2022-03-03 19:37:51,104 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:51,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2022-03-03 19:37:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:37:51,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:37:51,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:37:51,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1667 treesize of output 1612 [2022-03-03 19:38:01,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:01,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:01,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:01,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:01,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 14 [2022-03-03 19:38:02,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:02,011 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 1 case distinctions, treesize of input 20 treesize of output 23 [2022-03-03 19:38:02,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:02,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:02,020 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:38:02,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:02,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 17 [2022-03-03 19:38:02,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:02,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 8 [2022-03-03 19:38:02,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:02,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:02,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:02,050 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 14 [2022-03-03 19:38:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:02,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14584533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:02,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:02,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-03-03 19:38:02,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028182246] [2022-03-03 19:38:02,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:02,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:38:02,131 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:02,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:38:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:38:02,132 INFO L87 Difference]: Start difference. First operand 7638 states and 27848 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:06,367 INFO L93 Difference]: Finished difference Result 18582 states and 65753 transitions. [2022-03-03 19:38:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:38:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:38:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:06,426 INFO L225 Difference]: With dead ends: 18582 [2022-03-03 19:38:06,426 INFO L226 Difference]: Without dead ends: 18528 [2022-03-03 19:38:06,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=545, Invalid=3877, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:38:06,429 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 196 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:06,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 372 Invalid, 1823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 902 Invalid, 0 Unknown, 897 Unchecked, 0.5s Time] [2022-03-03 19:38:06,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18528 states. [2022-03-03 19:38:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18528 to 7683. [2022-03-03 19:38:06,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7683 states, 7682 states have (on average 3.6517833897422545) internal successors, (28053), 7682 states have internal predecessors, (28053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:06,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7683 states to 7683 states and 28053 transitions. [2022-03-03 19:38:06,691 INFO L78 Accepts]: Start accepts. Automaton has 7683 states and 28053 transitions. Word has length 30 [2022-03-03 19:38:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:06,691 INFO L470 AbstractCegarLoop]: Abstraction has 7683 states and 28053 transitions. [2022-03-03 19:38:06,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7683 states and 28053 transitions. [2022-03-03 19:38:06,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:38:06,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:06,706 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] [2022-03-03 19:38:06,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-03 19:38:06,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-03 19:38:06,906 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:06,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1321740765, now seen corresponding path program 19 times [2022-03-03 19:38:06,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:06,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279534345] [2022-03-03 19:38:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:07,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:07,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279534345] [2022-03-03 19:38:07,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279534345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:07,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001938668] [2022-03-03 19:38:07,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:38:07,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:07,158 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:07,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:38:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:07,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:07,432 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 10 treesize of output 9 [2022-03-03 19:38:07,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:07,524 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-03 19:38:07,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 36 [2022-03-03 19:38:07,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:07,529 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 37 [2022-03-03 19:38:07,625 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 [2022-03-03 19:38:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:07,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:07,883 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:38:07,883 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 1878 treesize of output 1782 [2022-03-03 19:38:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:08,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:08,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:08,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:08,293 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:38:08,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-03 19:38:08,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:08,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:08,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:08,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:38:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:08,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001938668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:08,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:08,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-03 19:38:08,395 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636064218] [2022-03-03 19:38:08,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:08,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:38:08,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:08,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:38:08,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:38:08,396 INFO L87 Difference]: Start difference. First operand 7683 states and 28053 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:11,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:11,962 INFO L93 Difference]: Finished difference Result 19248 states and 66888 transitions. [2022-03-03 19:38:11,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:38:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:38:11,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:12,004 INFO L225 Difference]: With dead ends: 19248 [2022-03-03 19:38:12,004 INFO L226 Difference]: Without dead ends: 19215 [2022-03-03 19:38:12,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=707, Invalid=3985, Unknown=0, NotChecked=0, Total=4692 [2022-03-03 19:38:12,006 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 259 mSDsluCounter, 675 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:12,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 434 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 2393 Invalid, 0 Unknown, 93 Unchecked, 1.2s Time] [2022-03-03 19:38:12,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19215 states. [2022-03-03 19:38:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19215 to 7708. [2022-03-03 19:38:12,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7708 states, 7707 states have (on average 3.6522641754249383) internal successors, (28148), 7707 states have internal predecessors, (28148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7708 states to 7708 states and 28148 transitions. [2022-03-03 19:38:12,246 INFO L78 Accepts]: Start accepts. Automaton has 7708 states and 28148 transitions. Word has length 30 [2022-03-03 19:38:12,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:12,246 INFO L470 AbstractCegarLoop]: Abstraction has 7708 states and 28148 transitions. [2022-03-03 19:38:12,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:12,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7708 states and 28148 transitions. [2022-03-03 19:38:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:38:12,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:12,258 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] [2022-03-03 19:38:12,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-03 19:38:12,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:38:12,463 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:12,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:12,464 INFO L85 PathProgramCache]: Analyzing trace with hash -577320523, now seen corresponding path program 20 times [2022-03-03 19:38:12,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:12,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388812464] [2022-03-03 19:38:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:12,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:12,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388812464] [2022-03-03 19:38:12,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388812464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:12,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782345362] [2022-03-03 19:38:12,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:38:12,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:12,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:12,708 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:12,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:38:12,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:38:12,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:12,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:12,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:12,957 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 10 treesize of output 9 [2022-03-03 19:38:13,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:13,040 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-03 19:38:13,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 34 [2022-03-03 19:38:13,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:13,044 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 37 [2022-03-03 19:38:13,125 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 [2022-03-03 19:38:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:13,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:13,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1878 treesize of output 1782 [2022-03-03 19:38:13,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:13,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:13,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:13,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 41 [2022-03-03 19:38:13,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:13,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:13,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:38:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:13,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782345362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:13,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:13,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-03 19:38:13,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296162117] [2022-03-03 19:38:13,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:13,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:38:13,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:38:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:38:13,927 INFO L87 Difference]: Start difference. First operand 7708 states and 28148 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:15,166 INFO L93 Difference]: Finished difference Result 12582 states and 45616 transitions. [2022-03-03 19:38:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-03 19:38:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:38:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:15,199 INFO L225 Difference]: With dead ends: 12582 [2022-03-03 19:38:15,200 INFO L226 Difference]: Without dead ends: 12528 [2022-03-03 19:38:15,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=252, Invalid=1554, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:38:15,200 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 196 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:15,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 193 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1224 Invalid, 0 Unknown, 206 Unchecked, 0.6s Time] [2022-03-03 19:38:15,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12528 states. [2022-03-03 19:38:15,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12528 to 8262. [2022-03-03 19:38:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8262 states, 8261 states have (on average 3.669894685873381) internal successors, (30317), 8261 states have internal predecessors, (30317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:15,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8262 states to 8262 states and 30317 transitions. [2022-03-03 19:38:15,362 INFO L78 Accepts]: Start accepts. Automaton has 8262 states and 30317 transitions. Word has length 30 [2022-03-03 19:38:15,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:15,362 INFO L470 AbstractCegarLoop]: Abstraction has 8262 states and 30317 transitions. [2022-03-03 19:38:15,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:15,362 INFO L276 IsEmpty]: Start isEmpty. Operand 8262 states and 30317 transitions. [2022-03-03 19:38:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:38:15,375 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:15,375 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] [2022-03-03 19:38:15,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:15,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:15,576 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:15,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:15,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2027651609, now seen corresponding path program 21 times [2022-03-03 19:38:15,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:15,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360625685] [2022-03-03 19:38:15,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:15,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:15,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:15,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360625685] [2022-03-03 19:38:15,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360625685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:15,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682962814] [2022-03-03 19:38:15,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:38:15,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:15,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:15,824 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:15,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:38:15,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-03 19:38:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-03 19:38:15,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:16,020 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 10 treesize of output 9 [2022-03-03 19:38:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:16,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:16,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-03-03 19:38:16,147 INFO L353 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-03-03 19:38:16,147 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 39 treesize of output 37 [2022-03-03 19:38:16,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:16,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2022-03-03 19:38:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:16,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:17,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:17,339 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 35 treesize of output 33 [2022-03-03 19:38:17,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:17,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:17,372 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 35 treesize of output 33 [2022-03-03 19:38:17,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:17,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:17,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 59 [2022-03-03 19:38:17,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:17,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:17,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:17,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:17,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 11 [2022-03-03 19:38:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:18,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682962814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:18,016 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:18,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-03 19:38:18,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216022676] [2022-03-03 19:38:18,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:18,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:38:18,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:38:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:38:18,017 INFO L87 Difference]: Start difference. First operand 8262 states and 30317 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) [2022-03-03 19:38:24,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:24,046 INFO L93 Difference]: Finished difference Result 22020 states and 77830 transitions. [2022-03-03 19:38:24,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 19:38:24,047 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 30 [2022-03-03 19:38:24,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:24,097 INFO L225 Difference]: With dead ends: 22020 [2022-03-03 19:38:24,098 INFO L226 Difference]: Without dead ends: 21882 [2022-03-03 19:38:24,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2319, Invalid=12443, Unknown=0, NotChecked=0, Total=14762 [2022-03-03 19:38:24,101 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 541 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 3653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2646 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:24,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [541 Valid, 621 Invalid, 3653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 920 Invalid, 0 Unknown, 2646 Unchecked, 0.6s Time] [2022-03-03 19:38:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21882 states. [2022-03-03 19:38:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21882 to 8357. [2022-03-03 19:38:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8357 states, 8356 states have (on average 3.669100047869794) internal successors, (30659), 8356 states have internal predecessors, (30659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8357 states to 8357 states and 30659 transitions. [2022-03-03 19:38:24,366 INFO L78 Accepts]: Start accepts. Automaton has 8357 states and 30659 transitions. Word has length 30 [2022-03-03 19:38:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:24,367 INFO L470 AbstractCegarLoop]: Abstraction has 8357 states and 30659 transitions. [2022-03-03 19:38:24,367 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) [2022-03-03 19:38:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 8357 states and 30659 transitions. [2022-03-03 19:38:24,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:38:24,381 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:24,381 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] [2022-03-03 19:38:24,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:24,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:24,581 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:24,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:24,582 INFO L85 PathProgramCache]: Analyzing trace with hash -2089941737, now seen corresponding path program 22 times [2022-03-03 19:38:24,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:24,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333898604] [2022-03-03 19:38:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:24,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:24,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333898604] [2022-03-03 19:38:24,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333898604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:24,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116826034] [2022-03-03 19:38:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:38:24,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:24,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:24,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:38:24,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:38:24,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:38:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:25,081 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 10 treesize of output 9 [2022-03-03 19:38:25,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:25,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:25,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:25,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 34 [2022-03-03 19:38:25,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:25,190 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 49 treesize of output 45 [2022-03-03 19:38:25,354 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 55 treesize of output 35 [2022-03-03 19:38:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:25,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:25,586 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-03 19:38:25,586 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 1878 treesize of output 1782 [2022-03-03 19:38:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:26,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:26,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:26,484 INFO L353 Elim1Store]: treesize reduction 14, result has 72.5 percent of original size [2022-03-03 19:38:26,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 47 [2022-03-03 19:38:26,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:26,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:26,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:26,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:38:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:26,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116826034] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:26,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:26,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-03 19:38:26,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840965433] [2022-03-03 19:38:26,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:26,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:38:26,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:26,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:38:26,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:38:26,611 INFO L87 Difference]: Start difference. First operand 8357 states and 30659 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) [2022-03-03 19:38:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:27,862 INFO L93 Difference]: Finished difference Result 13897 states and 50065 transitions. [2022-03-03 19:38:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:38:27,862 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 30 [2022-03-03 19:38:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:27,896 INFO L225 Difference]: With dead ends: 13897 [2022-03-03 19:38:27,896 INFO L226 Difference]: Without dead ends: 13868 [2022-03-03 19:38:27,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:38:27,897 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 201 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 1385 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:27,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 253 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1385 Invalid, 0 Unknown, 114 Unchecked, 0.7s Time] [2022-03-03 19:38:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13868 states. [2022-03-03 19:38:28,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13868 to 8326. [2022-03-03 19:38:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8326 states, 8325 states have (on average 3.669069069069069) internal successors, (30545), 8325 states have internal predecessors, (30545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8326 states to 8326 states and 30545 transitions. [2022-03-03 19:38:28,076 INFO L78 Accepts]: Start accepts. Automaton has 8326 states and 30545 transitions. Word has length 30 [2022-03-03 19:38:28,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:28,076 INFO L470 AbstractCegarLoop]: Abstraction has 8326 states and 30545 transitions. [2022-03-03 19:38:28,076 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) [2022-03-03 19:38:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 8326 states and 30545 transitions. [2022-03-03 19:38:28,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:38:28,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:28,089 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] [2022-03-03 19:38:28,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-03 19:38:28,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-03 19:38:28,290 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:28,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash 2003223385, now seen corresponding path program 23 times [2022-03-03 19:38:28,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:28,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259326551] [2022-03-03 19:38:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:28,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:28,579 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:28,579 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:28,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259326551] [2022-03-03 19:38:28,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259326551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:28,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937158285] [2022-03-03 19:38:28,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:38:28,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:28,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:28,581 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:28,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:38:28,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:38:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:38:28,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:28,796 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 14 treesize of output 13 [2022-03-03 19:38:28,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:28,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:28,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:28,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:28,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-03-03 19:38:28,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:28,949 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 21 [2022-03-03 19:38:29,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-03-03 19:38:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:29,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:29,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,447 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 454 treesize of output 422 [2022-03-03 19:38:29,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:29,676 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 22 treesize of output 41 [2022-03-03 19:38:29,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:38:29,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:29,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-03-03 19:38:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:29,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937158285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:38:29,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:38:29,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-03-03 19:38:29,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543683949] [2022-03-03 19:38:29,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:38:29,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:38:29,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:38:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:38:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:38:29,813 INFO L87 Difference]: Start difference. First operand 8326 states and 30545 transitions. Second operand has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:35,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:38:35,244 INFO L93 Difference]: Finished difference Result 20845 states and 73188 transitions. [2022-03-03 19:38:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-03 19:38:35,245 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:38:35,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:38:35,291 INFO L225 Difference]: With dead ends: 20845 [2022-03-03 19:38:35,292 INFO L226 Difference]: Without dead ends: 20755 [2022-03-03 19:38:35,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1276, Invalid=11380, Unknown=0, NotChecked=0, Total=12656 [2022-03-03 19:38:35,293 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 535 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 715 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:38:35,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 962 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2588 Invalid, 0 Unknown, 715 Unchecked, 1.5s Time] [2022-03-03 19:38:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20755 states. [2022-03-03 19:38:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20755 to 10144. [2022-03-03 19:38:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 3.7418909592822636) internal successors, (37954), 10143 states have internal predecessors, (37954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 37954 transitions. [2022-03-03 19:38:35,552 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 37954 transitions. Word has length 30 [2022-03-03 19:38:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:38:35,552 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 37954 transitions. [2022-03-03 19:38:35,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5806451612903225) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:38:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 37954 transitions. [2022-03-03 19:38:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:38:35,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:38:35,569 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] [2022-03-03 19:38:35,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:35,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:38:35,784 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-03 19:38:35,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:38:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -547324907, now seen corresponding path program 24 times [2022-03-03 19:38:35,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:38:35,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622456099] [2022-03-03 19:38:35,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:38:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:38:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:38:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:36,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:38:36,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622456099] [2022-03-03 19:38:36,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622456099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:38:36,013 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483442220] [2022-03-03 19:38:36,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:38:36,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:38:36,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:38:36,014 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:38:36,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:38:36,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:38:36,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:38:36,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:38:36,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:38:36,189 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 14 treesize of output 13 [2022-03-03 19:38:36,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:36,337 INFO L353 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2022-03-03 19:38:36,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable 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 47 treesize of output 36 [2022-03-03 19:38:36,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:38:36,342 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 30 treesize of output 30 [2022-03-03 19:38:36,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:36,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 38 [2022-03-03 19:38:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:38:36,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:38:37,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:38:37,167 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 2504 treesize of output 2417 [2022-03-03 19:38:37,175 WARN L325 FreeRefinementEngine]: Global settings require throwing the following exception [2022-03-03 19:38:37,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:38:37,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:38:37,376 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:273) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:145) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:93) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-03-03 19:38:37,380 INFO L158 Benchmark]: Toolchain (without parser) took 88952.31ms. Allocated memory was 178.3MB in the beginning and 1.0GB in the end (delta: 861.9MB). Free memory was 142.3MB in the beginning and 236.3MB in the end (delta: -94.0MB). Peak memory consumption was 768.5MB. Max. memory is 8.0GB. [2022-03-03 19:38:37,380 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 178.3MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:38:37,380 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.30ms. Allocated memory is still 178.3MB. Free memory was 142.2MB in the beginning and 140.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-03 19:38:37,380 INFO L158 Benchmark]: Boogie Preprocessor took 23.42ms. Allocated memory is still 178.3MB. Free memory was 140.7MB in the beginning and 139.7MB in the end (delta: 978.6kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 19:38:37,380 INFO L158 Benchmark]: RCFGBuilder took 268.91ms. Allocated memory is still 178.3MB. Free memory was 139.7MB in the beginning and 130.1MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 19:38:37,380 INFO L158 Benchmark]: TraceAbstraction took 88628.69ms. Allocated memory was 178.3MB in the beginning and 1.0GB in the end (delta: 861.9MB). Free memory was 129.6MB in the beginning and 236.3MB in the end (delta: -106.8MB). Peak memory consumption was 755.9MB. Max. memory is 8.0GB. [2022-03-03 19:38:37,381 INFO L339 ainManager$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 178.3MB. Free memory is still 143.4MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.30ms. Allocated memory is still 178.3MB. Free memory was 142.2MB in the beginning and 140.7MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.42ms. Allocated memory is still 178.3MB. Free memory was 140.7MB in the beginning and 139.7MB in the end (delta: 978.6kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 268.91ms. Allocated memory is still 178.3MB. Free memory was 139.7MB in the beginning and 130.1MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 88628.69ms. Allocated memory was 178.3MB in the beginning and 1.0GB in the end (delta: 861.9MB). Free memory was 129.6MB in the beginning and 236.3MB in the end (delta: -106.8MB). Peak memory consumption was 755.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-03-03 19:38:37,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...